Vulnerability Description
Discourse is an open-source discussion platform. Versions prior to 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 have a security flaw in the discourse-policy plugin which allowed a user with policy creation permission to gain membership access to any private/restricted groups. Once membership to a private/restricted group has been obtained, the user will be able to read private topics that only the group has access to. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. As a workaround, review all policies for the use of `add-users-to-group` and temporarily remove the attribute from the policy. Alternatively, disable the discourse-policy plugin by disabling the `policy_enabled` site setting.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Discourse | Discourse | >= 2026.1.0, < 2026.1.2 |
Related Weaknesses (CWE)
References
- https://github.com/discourse/discourse/commit/64e2514ac17046cfaa8bc68a3c5140bc40Patch
- https://github.com/discourse/discourse/commit/c14b8a4cc5fc94e4839a83c5d557658975Patch
- https://github.com/discourse/discourse/commit/dcde9de530f515e88f99957056ffbcc2e1Patch
- https://github.com/discourse/discourse/security/advisories/GHSA-6cc8-x3rm-j5pfVendor Advisory
FAQ
What is CVE-2026-28282?
CVE-2026-28282 is a vulnerability with a CVSS score of 6.5 (MEDIUM). Discourse is an open-source discussion platform. Versions prior to 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 have a security flaw in the discourse-policy plugin which allowed a user with policy creati...
How severe is CVE-2026-28282?
CVE-2026-28282 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-28282?
Check the references section above for vendor advisories and patch information. Affected products include: Discourse Discourse.