CVE-2026-84302Discourse: Non-participant moderators can read, edit, and delete PM content through Discourse AI reviewables
- 4.2MediumCVSS base score
- 0.24%Exploitation in 30 daysEPSS · top 85% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By GitHub_M
- 23 days later
· 23 days later
Published
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | Medium4.2 | CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:N/A:N |
| NVDNVD · Deferred | 3.1 | Medium4.2 | CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:N/A:N |
- EPSS (exploitation in 30 days)
- 0.24% · top 85% of all CVEs (15 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.2.
Affected products
References
References6
- https://github.com/discourse/discourse/security/advisories/GHSA-3rx9-fqgh-wfpc (opens in a new tab)x_refsource_CONFIRM
- https://github.com/discourse/discourse/pull/42091 (opens in a new tab)x_refsource_MISC
- https://github.com/discourse/discourse/commit/1566d04524c01472375944bbf7b198dd09a99427 (opens in a new tab)x_refsource_MISC
- https://github.com/discourse/discourse/commit/23488b72a200228e805c4e6d970fbad216d328c5 (opens in a new tab)x_refsource_MISC
- https://github.com/discourse/discourse/commit/38d10c0e5d1b76540d2860455e0290f8e975c9fd (opens in a new tab)x_refsource_MISC
- https://github.com/discourse/discourse/commit/b323702d87cd82c327c116d9566477f3c4f9635f (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-86297 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-84302)Record last updated .