{"id":"CVE-2026-84302","state":"PUBLISHED","title":"Discourse: Non-participant moderators can read, edit, and delete PM content through Discourse AI reviewables","description":"Discourse is an open-source discussion platform. Prior to 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0, Discourse AI reviewables associated with private messages could appear in the moderator review queue of a moderator who was not a participant in the message. Reviewable visibility filtering did not restrict private-message reviewables to the audience permitted to access the underlying private-message topic, allowing the moderator to read otherwise confidential content. Depending on the available reviewable action, the moderator could also modify the private message by closing its topic or deleting a post. Exploitation requires an authenticated moderator account and a pre-existing Discourse AI reviewable associated with a private message. This issue is fixed in versions 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0.","publishedAt":"2026-09-24T16:49:56.499Z","updatedAt":"2026-09-24T17:04:51.257Z","severity":{"score":4.2,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:N/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["discourse discourse"],"affected":[{"vendor":"discourse","product":"discourse","versions":[{"version":"< 2026.7.0","status":"affected"},{"version":">= 2026.6.0-latest, < 2026.6.1","status":"affected"},{"version":">= 2026.5.0-latest, < 2026.5.2","status":"affected"},{"version":">= 2026.1.0-latest, < 2026.1.6","status":"affected"}]}],"references":["https://github.com/discourse/discourse/security/advisories/GHSA-3rx9-fqgh-wfpc","https://github.com/discourse/discourse/pull/42091","https://github.com/discourse/discourse/commit/1566d04524c01472375944bbf7b198dd09a99427","https://github.com/discourse/discourse/commit/23488b72a200228e805c4e6d970fbad216d328c5","https://github.com/discourse/discourse/commit/38d10c0e5d1b76540d2860455e0290f8e975c9fd","https://github.com/discourse/discourse/commit/b323702d87cd82c327c116d9566477f3c4f9635f"],"weaknesses":["CWE-862"],"ingestedAt":"2026-10-29T20:13:15.269Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/84xxx/CVE-2026-84302.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-84302","state":"PUBLISHED","datePublished":"2026-09-24T16:49:56.499Z","dateUpdated":"2026-09-24T17:04:51.257Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-09-01T16:17:43.078Z"},"containers":{"cna":{"title":"Discourse: Non-participant moderators can read, edit, and delete PM content through Discourse AI reviewables","descriptions":[{"lang":"en","value":"Discourse is an open-source discussion platform. Prior to 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0, Discourse AI reviewables associated with private messages could appear in the moderator review queue of a moderator who was not a participant in the message. Reviewable visibility filtering did not restrict private-message reviewables to the audience permitted to access the underlying private-message topic, allowing the moderator to read otherwise confidential content. Depending on the available reviewable action, the moderator could also modify the private message by closing its topic or deleting a post. Exploitation requires an authenticated moderator account and a pre-existing Discourse AI reviewable associated with a private message. This issue is fixed in versions 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0."}],"affected":[{"vendor":"discourse","product":"discourse","versions":[{"version":"< 2026.7.0","status":"affected"},{"version":">= 2026.6.0-latest, < 2026.6.1","status":"affected"},{"version":">= 2026.5.0-latest, < 2026.5.2","status":"affected"},{"version":">= 2026.1.0-latest, < 2026.1.6","status":"affected"}]}],"references":[{"url":"https://github.com/discourse/discourse/security/advisories/GHSA-3rx9-fqgh-wfpc","name":"https://github.com/discourse/discourse/security/advisories/GHSA-3rx9-fqgh-wfpc","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/discourse/discourse/pull/42091","name":"https://github.com/discourse/discourse/pull/42091","tags":["x_refsource_MISC"]},{"url":"https://github.com/discourse/discourse/commit/1566d04524c01472375944bbf7b198dd09a99427","name":"https://github.com/discourse/discourse/commit/1566d04524c01472375944bbf7b198dd09a99427","tags":["x_refsource_MISC"]},{"url":"https://github.com/discourse/discourse/commit/23488b72a200228e805c4e6d970fbad216d328c5","name":"https://github.com/discourse/discourse/commit/23488b72a200228e805c4e6d970fbad216d328c5","tags":["x_refsource_MISC"]},{"url":"https://github.com/discourse/discourse/commit/38d10c0e5d1b76540d2860455e0290f8e975c9fd","name":"https://github.com/discourse/discourse/commit/38d10c0e5d1b76540d2860455e0290f8e975c9fd","tags":["x_refsource_MISC"]},{"url":"https://github.com/discourse/discourse/commit/b323702d87cd82c327c116d9566477f3c4f9635f","name":"https://github.com/discourse/discourse/commit/b323702d87cd82c327c116d9566477f3c4f9635f","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":4.2,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"HIGH","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:N/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-862","lang":"en","description":"CWE-862: Missing Authorization","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-09-24T16:49:56.499Z"},"source":{"advisory":"GHSA-3rx9-fqgh-wfpc","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-24T17:04:31.550424Z","id":"CVE-2026-84302","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-24T17:04:51.257Z"}}]}}}