CVE-2026-27150

Discourse doesn't ensure guardian check when creating QueryGroupBookmark

State: Published
Severity: 1.3 Low
Published: Feb 26, 2026
Updated: Mar 3, 2026
Reserved: Feb 18, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	1.3 Low	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	GitHub_M

Weaknesses

CWE-862 Missing Authorization

Affected Products

Product	Versions
discoursediscourse	< 2025.12.2Affected >= 2026.1.0-latest, < 2026.1.1Affected >= 2026.2.0-latest, < 2026.2.0Affected

References

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

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