CVE-2026-84302
mediumDiscourse is an open-source discussion platform.
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.
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:N/A:N Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/discourse/discourse/commit/1566d04524c01472375944bbf7b198dd09a99427 security-advisories@github.com
- https://github.com/discourse/discourse/commit/23488b72a200228e805c4e6d970fbad216d328c5 security-advisories@github.com
- https://github.com/discourse/discourse/commit/38d10c0e5d1b76540d2860455e0290f8e975c9fd security-advisories@github.com
- https://github.com/discourse/discourse/commit/b323702d87cd82c327c116d9566477f3c4f9635f security-advisories@github.com
- https://github.com/discourse/discourse/pull/42091 security-advisories@github.com
- https://github.com/discourse/discourse/security/advisories/GHSA-3rx9-fqgh-wfpc security-advisories@github.com