302 lines
15 KiB
JSON
302 lines
15 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-2026-78223",
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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": "2026-09-11T18:30:01.328Z",
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"datePublished": "2026-09-17T13:09:19.591Z",
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"dateUpdated": "2026-09-17T18:28:20.821Z"
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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.TokenResource.RevokeTokenChange'"
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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/token_resource/revoke_token_change.ex"
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],
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"programRoutines": [
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{
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"name": "'Elixir.AshAuthentication.TokenResource.RevokeTokenChange':change/3"
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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": "0.2.0",
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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.TokenResource.RevokeTokenChange'"
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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/token_resource/revoke_token_change.ex"
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],
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"programRoutines": [
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{
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"name": "'Elixir.AshAuthentication.TokenResource.RevokeTokenChange':change/3"
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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": "344cebb12faf68e648d3283394073ba0c0f78459",
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"status": "unaffected"
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},
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{
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"at": "eb86353fe5a547c5ff5fd9af0e2c212518c31c9b",
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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": "a939dde9b917c072cdf10c4b0913a9886a4b0231",
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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": "0.2.0",
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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": "2026-09-11T18:31:49.000Z",
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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>Improper Verification of Cryptographic Signature vulnerability in team-alembic AshAuthentication allows a caller of the token revocation action to neutralise a revocation or write arbitrary rows into the token resource.</p>\n<p><code>AshAuthentication.TokenResource.RevokeTokenChange.change/3</code> reads the <code>:token</code> argument and decodes it with <code>AshAuthentication.Jwt.peek/1</code>, which delegates to <code>Joken.peek_claims/1</code> and performs no signature check, unlike <code>Jwt.verify/4</code>. The <code>jti</code>, <code>exp</code> and <code>sub</code> claims it returns are written straight onto the revocation record, guarded only by <code>byte_size(token) > 0</code>. Because <code>expires_at</code> derives from the attacker-chosen <code>exp</code>, a forged copy of a genuine token that keeps the real <code>jti</code> but backdates <code>exp</code> yields a revocation row that is already expired: <code>expunge_expired</code> removes it and the genuine token passes <code>revoked?</code> again. Arbitrary <code>jti</code> and <code>sub</code> values can be inserted the same way.</p>\n<p>This issue affects ash_authentication: from 0.2.0 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": "Improper Verification of Cryptographic Signature vulnerability in team-alembic AshAuthentication allows a caller of the token revocation action to neutralise a revocation or write arbitrary rows into the token resource.\n\n`AshAuthentication.TokenResource.RevokeTokenChange.change/3` reads the `:token` argument and decodes it with `AshAuthentication.Jwt.peek/1`, which delegates to `Joken.peek_claims/1` and performs no signature check, unlike `Jwt.verify/4`. The `jti`, `exp` and `sub` claims it returns are written straight onto the revocation record, guarded only by `byte_size(token) > 0`. Because `expires_at` derives from the attacker-chosen `exp`, a forged copy of a genuine token that keeps the real `jti` but backdates `exp` yields a revocation row that is already expired: `expunge_expired` removes it and the genuine token passes `revoked?` again. Arbitrary `jti` and `sub` values can be inserted the same way.\n\nThis issue affects ash_authentication: from 0.2.0 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": "Improper Verification of Cryptographic Signature vulnerability in team-alembic AshAuthentication allows a caller of the token revocation action to neutralise a revocation or write arbitrary rows into the token resource.\n\nAshAuthentication.TokenResource.RevokeTokenChange.change/3 reads the :token argument and decodes it with AshAuthentication.Jwt.peek/1, which delegates to Joken.peek_claims/1 and performs no signature check, unlike Jwt.verify/4. The jti, exp and sub claims it returns are written straight onto the revocation record, guarded only by byte_size(token) > 0. Because expires_at derives from the attacker-chosen exp, a forged copy of a genuine token that keeps the real jti but backdates exp yields a revocation row that is already expired: expunge_expired removes it and the genuine token passes revoked? again. Arbitrary jti and sub values can be inserted the same way.\n\nThis issue affects ash_authentication: from 0.2.0 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-475",
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"descriptions": [
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{
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"lang": "en",
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"value": "CAPEC-475 Signature Spoofing by Improper Validation"
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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": "LOW",
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"attackRequirements": "NONE",
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"attackVector": "NETWORK",
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"baseScore": 6.9,
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"baseSeverity": "MEDIUM",
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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": "NONE",
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"valueDensity": "NOT_DEFINED",
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"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/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": "NONE",
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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-347",
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"description": "CWE-347 Improper Verification of Cryptographic Signature",
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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": "2026-09-17T13:09:19.591Z"
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},
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"references": [
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{
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"tags": [
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"related",
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"vendor-advisory"
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],
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"url": "https://github.com/team-alembic/ash_authentication/security/advisories/GHSA-mfwg-5cpf-px58"
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},
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{
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"name": "EEF CNA record for CVE-2026-78223",
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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-2026-78223.html"
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},
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{
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"name": "OSV record EEF-CVE-2026-78223",
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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-2026-78223"
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},
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{
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"name": "Introducing commit a939dde 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/a939dde9b917c072cdf10c4b0913a9886a4b0231"
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},
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{
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"name": "Fix commit 344cebb 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/344cebb12faf68e648d3283394073ba0c0f78459"
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},
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{
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"name": "Fix commit eb86353 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/eb86353fe5a547c5ff5fd9af0e2c212518c31c9b"
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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": "Token revocation record built from unverified JWT claims 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": "2026-09-17T18:28:12.763636Z",
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"id": "CVE-2026-78223",
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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": "yes"
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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": "2026-09-17T18:28:20.821Z"
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}
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}
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]
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}
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} |