308 lines
16 KiB
JSON
308 lines
16 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-81637",
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"assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
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"state": "PUBLISHED",
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"assignerShortName": "EEF",
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"dateReserved": "2026-09-11T18:15:01.808Z",
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"datePublished": "2026-09-17T13:09:06.571Z",
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"dateUpdated": "2026-09-17T18:26:58.389Z"
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},
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"containers": {
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"cna": {
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"affected": [
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{
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"collectionURL": "https://repo.hex.pm",
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"cpes": [
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"cpe:2.3:a:team-alembic:ash_authentication:*:*:*:*:*:*:*:*"
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],
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"defaultStatus": "unaffected",
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"modules": [
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"'Elixir.AshAuthentication.Strategy.OAuth2.Plug'"
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],
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"packageName": "ash_authentication",
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"packageURL": "pkg:hex/ash_authentication",
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"product": "ash_authentication",
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"programFiles": [
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"lib/ash_authentication/strategies/oauth2/plug.ex"
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],
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"programRoutines": [
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{
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"name": "'Elixir.AshAuthentication.Strategy.OAuth2.Plug':callback/2"
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},
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{
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"name": "'Elixir.AshAuthentication.Strategy.OAuth2.Plug':request/2"
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}
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],
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"repo": "https://github.com/team-alembic/ash_authentication",
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"vendor": "team-alembic",
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"versions": [
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{
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"lessThan": "4.15.0",
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"status": "affected",
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"version": "0.6.0",
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"versionType": "semver"
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},
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{
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"lessThan": "5.0.0-rc.14",
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"status": "affected",
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"version": "5.0.0-rc.0",
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"versionType": "semver"
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}
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]
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},
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{
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"collectionURL": "https://github.com",
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"cpes": [
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"cpe:2.3:a:team-alembic:ash_authentication:*:*:*:*:*:*:*:*"
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],
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"defaultStatus": "unaffected",
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"modules": [
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"'Elixir.AshAuthentication.Strategy.OAuth2.Plug'"
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],
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"packageName": "team-alembic/ash_authentication",
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"packageURL": "pkg:github/team-alembic/ash_authentication",
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"product": "ash_authentication",
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"programFiles": [
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"lib/ash_authentication/strategies/oauth2/plug.ex"
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],
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"programRoutines": [
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{
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"name": "'Elixir.AshAuthentication.Strategy.OAuth2.Plug':callback/2"
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},
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{
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"name": "'Elixir.AshAuthentication.Strategy.OAuth2.Plug':request/2"
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}
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],
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"repo": "https://github.com/team-alembic/ash_authentication",
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"vendor": "team-alembic",
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"versions": [
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{
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"changes": [
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{
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"at": "bd4352303bc9d72d007f6818775267585a4bcc2f",
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"status": "unaffected"
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},
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{
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"at": "d7f939cd02bd618bcaa304631846fa75ffc419d7",
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"status": "unaffected"
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}
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],
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"lessThan": "*",
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"status": "affected",
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"version": "c5f589058e04239263f50a1430eb17ea6d5dd1a2",
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"versionType": "git"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"cpeMatch": [
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{
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"criteria": "cpe:2.3:a:team-alembic:ash_authentication:*:*:*:*:*:*:*:*",
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"versionEndExcluding": "4.15.0",
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"versionStartIncluding": "0.6.0",
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"vulnerable": true
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},
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{
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"criteria": "cpe:2.3:a:team-alembic:ash_authentication:*:*:*:*:*:*:*:*",
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"versionEndExcluding": "5.0.0-rc.14",
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"versionStartIncluding": "5.0.0-rc.0",
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"vulnerable": true
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}
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],
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"negate": false,
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"operator": "OR"
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}
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],
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"operator": "AND"
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}
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],
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"credits": [
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{
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"lang": "en",
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"type": "reporter",
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"value": "Peter Ullrich"
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},
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{
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"lang": "en",
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"type": "analyst",
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"value": "Jonatan Männchen / EEF"
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},
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{
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"lang": "en",
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"type": "remediation developer",
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"value": "James Harton"
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}
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],
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"dateAssigned": "2026-09-11T18:16:32.000Z",
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"descriptions": [
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{
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"lang": "en",
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"supportingMedia": [
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{
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"base64": false,
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"type": "text/html",
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"value": "<p>Insufficient Session Expiration vulnerability in team-alembic AshAuthentication allows an attacker who obtains a victim's OAuth2 <code>state</code> value to replay the callback and sign that victim into an attacker-controlled account.</p>\n<p><code>AshAuthentication.Strategy.OAuth2.Plug.callback/2</code> clears the stored <code>session_params</code> through a rebinding step inside its <code>with</code> chain, <code>conn <- delete_session(conn, session_key)</code>. Elixir evaluates the <code>else</code> block in the scope enclosing the <code>with</code>, so every failure path (the provider returning <code>?error=access_denied</code>, an invalid code, a token-exchange error, or a registration or sign-in failure) reaches <code>store_authentication_result/2</code> holding the original connection and the session entry is never removed. The value the module's own comment describes as protection against a CSRF-related attack is therefore consumed only when authentication succeeds, and survives a cancelled or failed attempt until the next request phase or session expiry.</p>\n<p>This issue affects ash_authentication: from 0.6.0 before 4.15.0 and from 5.0.0-rc.0 before 5.0.0-rc.14.</p>"
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},
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{
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"base64": false,
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"type": "text/markdown",
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"value": "Insufficient Session Expiration vulnerability in team-alembic AshAuthentication allows an attacker who obtains a victim's OAuth2 `state` value to replay the callback and sign that victim into an attacker-controlled account.\n\n`AshAuthentication.Strategy.OAuth2.Plug.callback/2` clears the stored `session_params` through a rebinding step inside its `with` chain, `conn <- delete_session(conn, session_key)`. Elixir evaluates the `else` block in the scope enclosing the `with`, so every failure path (the provider returning `?error=access_denied`, an invalid code, a token-exchange error, or a registration or sign-in failure) reaches `store_authentication_result/2` holding the original connection and the session entry is never removed. The value the module's own comment describes as protection against a CSRF-related attack is therefore consumed only when authentication succeeds, and survives a cancelled or failed attempt until the next request phase or session expiry.\n\nThis issue affects ash_authentication: from 0.6.0 before 4.15.0 and from 5.0.0-rc.0 before 5.0.0-rc.14."
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}
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],
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"value": "Insufficient Session Expiration vulnerability in team-alembic AshAuthentication allows an attacker who obtains a victim's OAuth2 state value to replay the callback and sign that victim into an attacker-controlled account.\n\nAshAuthentication.Strategy.OAuth2.Plug.callback/2 clears the stored session_params through a rebinding step inside its with chain, conn <- delete_session(conn, session_key). Elixir evaluates the else block in the scope enclosing the with, so every failure path (the provider returning ?error=access_denied, an invalid code, a token-exchange error, or a registration or sign-in failure) reaches store_authentication_result/2 holding the original connection and the session entry is never removed. The value the module's own comment describes as protection against a CSRF-related attack is therefore consumed only when authentication succeeds, and survives a cancelled or failed attempt until the next request phase or session expiry.\n\nThis issue affects ash_authentication: from 0.6.0 before 4.15.0 and from 5.0.0-rc.0 before 5.0.0-rc.14."
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}
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],
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"impacts": [
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{
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"capecId": "CAPEC-60",
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"descriptions": [
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{
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"lang": "en",
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"value": "CAPEC-60 Reusing Session IDs (aka Session Replay)"
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}
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]
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}
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],
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"metrics": [
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{
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"cvssV4_0": {
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"Automatable": "NOT_DEFINED",
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"Recovery": "NOT_DEFINED",
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"Safety": "NOT_DEFINED",
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"attackComplexity": "HIGH",
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"attackRequirements": "PRESENT",
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"attackVector": "NETWORK",
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"baseScore": 2.3,
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"baseSeverity": "LOW",
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"privilegesRequired": "NONE",
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"providerUrgency": "NOT_DEFINED",
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"subAvailabilityImpact": "NONE",
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"subConfidentialityImpact": "NONE",
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"subIntegrityImpact": "NONE",
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"userInteraction": "PASSIVE",
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"valueDensity": "NOT_DEFINED",
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"vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N",
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"version": "4.0",
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"vulnAvailabilityImpact": "NONE",
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"vulnConfidentialityImpact": "LOW",
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"vulnIntegrityImpact": "LOW",
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"vulnerabilityResponseEffort": "NOT_DEFINED"
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},
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"format": "CVSS",
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"scenarios": [
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{
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"lang": "en",
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"value": "GENERAL"
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}
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]
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}
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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"cweId": "CWE-613",
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"description": "CWE-613 Insufficient Session Expiration",
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"lang": "en",
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"type": "CWE"
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}
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]
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}
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],
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"providerMetadata": {
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"orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
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"shortName": "EEF",
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"dateUpdated": "2026-09-17T13:09:06.571Z"
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},
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"references": [
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{
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"tags": [
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"vendor-advisory",
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"related"
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],
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"url": "https://github.com/team-alembic/ash_authentication/security/advisories/GHSA-3vcj-gxx8-3p44"
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},
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{
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"name": "EEF CNA record for CVE-2026-81637",
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"tags": [
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"related"
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],
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"url": "https://cna.erlef.org/cves/CVE-2026-81637.html"
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},
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{
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"name": "OSV record EEF-CVE-2026-81637",
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"tags": [
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"related"
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],
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"url": "https://osv.dev/vulnerability/EEF-CVE-2026-81637"
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},
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{
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"name": "Introducing commit c5f5890 in team-alembic/ash_authentication",
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"tags": [
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"related"
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],
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"url": "https://github.com/team-alembic/ash_authentication/commit/c5f589058e04239263f50a1430eb17ea6d5dd1a2"
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},
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{
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"name": "Fix commit bd43523 in team-alembic/ash_authentication",
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"tags": [
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"patch"
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],
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"url": "https://github.com/team-alembic/ash_authentication/commit/bd4352303bc9d72d007f6818775267585a4bcc2f"
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},
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{
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"name": "Fix commit d7f939c in team-alembic/ash_authentication",
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"tags": [
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"patch"
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],
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"url": "https://github.com/team-alembic/ash_authentication/commit/d7f939cd02bd618bcaa304631846fa75ffc419d7"
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}
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],
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"source": {
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"discovery": "INTERNAL"
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},
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"title": "Replayable OAuth2 CSRF state retained after a failed callback in AshAuthentication"
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},
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2026-09-17T18:26:48.969731Z",
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"id": "CVE-2026-81637",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"role": "CISA Coordinator",
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"version": "2.0.3"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-09-17T18:26:58.389Z"
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}
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}
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]
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}
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} |