{"id":"CVE-2026-84302","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-84302","generatedAt":"2026-10-28T02:57:13.540Z","title":"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.","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.","published":"2026-09-24T17:17:07.000Z","lastModified":"2026-09-24T18:19:04.000Z","status":"Deferred","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":4.2,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:N/A:N"},"cwe":["CWE-862"],"affected":[],"epss":{"score":0.00238,"percentile":0.14683,"date":"2026-10-26","history":[{"date":"2026-09-25","score":0.00238,"percentile":0.13229}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.24%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-09-24T17:17:07.000Z","detail":{"score":"4.2","severity":"MEDIUM","publishedAt":"2026-09-24T17:17:06.793Z"},"summary":"New CVE, medium severity (CVSS 4.2)."}],"references":[{"url":"https://github.com/discourse/discourse/commit/1566d04524c01472375944bbf7b198dd09a99427","source":"security-advisories@github.com"},{"url":"https://github.com/discourse/discourse/commit/23488b72a200228e805c4e6d970fbad216d328c5","source":"security-advisories@github.com"},{"url":"https://github.com/discourse/discourse/commit/38d10c0e5d1b76540d2860455e0290f8e975c9fd","source":"security-advisories@github.com"},{"url":"https://github.com/discourse/discourse/commit/b323702d87cd82c327c116d9566477f3c4f9635f","source":"security-advisories@github.com"},{"url":"https://github.com/discourse/discourse/pull/42091","source":"security-advisories@github.com"},{"url":"https://github.com/discourse/discourse/security/advisories/GHSA-3rx9-fqgh-wfpc","source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-84302","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}