Vulnerability · Published Feb 26, 2026 · Assigned by GitHub_M

CVE-2026-27150Discourse doesn't ensure guardian check when creating QueryGroupBookmark

Low 1.3

In plain English

A low-severity missing authorization in discourse from discourse. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 7% of all known vulnerabilities).

Severity (CVSS 4.0)1.3Low

Exploit odds (30 days)0.2%top 93.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, missing `validate_before_create` authorization in Data Explorer's `QueryGroupBookmarkable` allows any logged-in user to create bookmarks for query groups they don't have access to, enabling metadata disclosure via bookmark reminder notifications. Versions 2025.12.2, 2026.1.1, and 2026.2.0 fix this issue and also make sure `validate_before_create` throws NotImplementedError in BaseBookmarkable if not implemented, to prevent similar issues in the future. No known workarounds are available.

Affected products (as reported)

Vendor	Product	Versions
discourse	discourse	< 2025.12.2>= 2026.1.0-latest, < 2026.1.1>= 2026.2.0-latest, < 2026.2.0

Weakness: CWE-862 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U

References

https://github.com/discourse/discourse/security/advisories/GHSA-rw95-54qr-qrw8 x_refsource_CONFIRM