165 lines
7.2 KiB
JSON
165 lines
7.2 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-2026-91134",
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"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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"state": "PUBLISHED",
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"assignerShortName": "GitHub_M",
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"dateReserved": "2026-09-14T19:36:48.844Z",
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"datePublished": "2026-09-24T16:51:34.057Z",
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"dateUpdated": "2026-09-29T02:56:30.376Z"
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},
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"containers": {
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"cna": {
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"title": "Discourse: Block post iframes whose encoded userinfo bypasses the allowed_iframes allowlist",
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"problemTypes": [
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{
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"descriptions": [
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{
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"cweId": "CWE-20",
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"lang": "en",
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"description": "CWE-20: Improper Input Validation",
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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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"metrics": [
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{
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"cvssV3_1": {
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"attackComplexity": "LOW",
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"attackVector": "NETWORK",
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"availabilityImpact": "NONE",
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"baseScore": 5.4,
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"baseSeverity": "MEDIUM",
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"confidentialityImpact": "LOW",
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"integrityImpact": "LOW",
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"privilegesRequired": "LOW",
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"scope": "UNCHANGED",
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"userInteraction": "NONE",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N",
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"version": "3.1"
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}
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}
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],
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"references": [
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{
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"name": "https://github.com/discourse/discourse/security/advisories/GHSA-54vw-chv3-wjpv",
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"tags": [
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"x_refsource_CONFIRM"
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],
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"url": "https://github.com/discourse/discourse/security/advisories/GHSA-54vw-chv3-wjpv"
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},
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{
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"name": "https://github.com/discourse/discourse/pull/42882",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/discourse/discourse/pull/42882"
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},
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{
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"name": "https://github.com/discourse/discourse/commit/0a8015e6c7a5079981843721494d30c9a91f5415",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/discourse/discourse/commit/0a8015e6c7a5079981843721494d30c9a91f5415"
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},
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{
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"name": "https://github.com/discourse/discourse/commit/1304b0c04f87534053b0d574ae5a9b9ba13dd590",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/discourse/discourse/commit/1304b0c04f87534053b0d574ae5a9b9ba13dd590"
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},
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{
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"name": "https://github.com/discourse/discourse/commit/bac7dd1201911851462483271b4567246fa1309d",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/discourse/discourse/commit/bac7dd1201911851462483271b4567246fa1309d"
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},
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{
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"name": "https://github.com/discourse/discourse/commit/fed3a58c48412ce7207b72a4629ddbc44482cd64",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/discourse/discourse/commit/fed3a58c48412ce7207b72a4629ddbc44482cd64"
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}
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],
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"affected": [
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{
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"vendor": "discourse",
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"product": "discourse",
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"versions": [
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{
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"version": "< 2026.8.0",
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"status": "affected"
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},
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{
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"version": ">= 2026.7.0-latest, < 2026.7.2",
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"status": "affected"
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},
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{
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"version": ">= 2026.6.0-latest, < 2026.6.3",
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"status": "affected"
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},
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{
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"version": ">= 2026.1.0-latest, < 2026.1.8",
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"status": "affected"
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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": "a0819718-46f1-4df5-94e2-005712e83aaa",
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"shortName": "GitHub_M",
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"dateUpdated": "2026-09-24T16:51:34.057Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "Discourse is an open-source discussion platform. Prior to 2026.1.8, 2026.6.3, 2026.7.2, and 2026.8.0, the Discourse post sanitizer allowed a stored cross-origin iframe to bypass the allowed_iframes prefix policy when the iframe src contained encoded userinfo. The sanitizer validated a decoded form differently from the stored iframe src, allowing the browser to interpret an attacker-controlled host while the allowlist check accepted the encoded URL as an allowed prefix. An authenticated user with posting privileges could persist the iframe in a post and cause attacker-controlled cross-origin content to be rendered. This issue is fixed in versions 2026.1.8, 2026.6.3, 2026.7.2, and 2026.8.0."
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}
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],
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"source": {
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"advisory": "GHSA-54vw-chv3-wjpv",
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"discovery": "UNKNOWN"
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}
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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": "2026-09-29T02:56:20.350456Z",
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"id": "CVE-2026-91134",
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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": "2026-09-29T02:56:30.376Z"
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}
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}
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]
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}
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} |