CVE-2026-26979 — Discourse: TL4 users are able to change status of restricted topics

CVE-2026-26979

Discourse: TL4 users are able to change status of restricted topics PUBLISHED

Description (CNA)

Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, TL4 users are able to close, archive and pin topics in private categories they don't have access to. Versions 2025.12.2, 2026.1.1, and 2026.2.0 patch the issue. No known workarounds are available.

Affected (CNA)

Vendor / product	Versions
discourse / discourse	affected < 2025.12.2; affected >= 2026.1.0-latest, < 2026.1.1; affected >= 2026.2.0-latest, < 2026.2.0

CWE

CWE-862

References

https://github.com/discourse/discourse/security/advisories/GHSA-9c7p-fqc5-c24f

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.