CVE-2026-27935

Discourse leaks private topic metadata to non-authorized users

CVSS 6.9 MEDIUMEPSS 0.3%CWE-201

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 6.9EPSS 0.3%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

19 Mar 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

Discourse is an open-source discussion platform. Versions prior to 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 have a vulnerability in an API endpoint that discloses private topic metadata of admin users to moderator users even if the moderators do not have access to the private topics. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. No known workarounds are available.

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Affected products

discourse · discourse

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References

https://github.com/discourse/discourse/commit/c0f6e9a903800de0dda65c114418ae703d8a51fc https://github.com/discourse/discourse/commit/d8dbb4cb189cded8c9e8b3ada859fc0db3f41897 https://github.com/discourse/discourse/commit/f37e4fdf8391e4a54f1885a3a5514d390eb28bab https://github.com/discourse/discourse/security/advisories/GHSA-wxqr-r4wv-cw76