CVE-2026-27935
Discourse leaks private topic metadata to non-authorized users
EPSS 0.05%
Description
Discourse is an open-source discussion platform. Versions prior to 2026.3.0, 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, 2026.2.1, and 2026.1.2 contain a patch. No known workarounds are available.
How to fix CVE-2026-27935
To remediate CVE-2026-27935, upgrade the affected package to a fixed version below.
- Bitnami/discourse—upgrade to 2026.1.2 or later
Is CVE-2026-27935 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- >= 2026.1.0, < 2026.1.2, >= 2026.2.0, < 2026.2.1, >= 2026.3.0, < 2026.4.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
References (5)
- WEBgithub.com/discourse/discourse/commit/c0f6e9a903800de0dda65c114418ae703d8a51fc
- WEBgithub.com/discourse/discourse/commit/d8dbb4cb189cded8c9e8b3ada859fc0db3f41897
- WEBgithub.com/discourse/discourse/commit/f37e4fdf8391e4a54f1885a3a5514d390eb28bab
- WEBgithub.com/discourse/discourse/security/advisories/GHSA-wxqr-r4wv-cw76