Auth bypass in Discourse

CVE-2026-33423

Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, staff can modify any user's group notification level. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. No know…

Vulnerability class: Broken Access Control

EPSS: 0.000 (4.8th percentile) — read the EPSS interpretation.

Affected products

Discourse — versions >= 2026.1.0-latest, < 2026.1.2, >= 2026.2.0-latest, < 2026.2.1, = 2026.3.0-latest

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

https://github.com/discourse/discourse/security/advisories/GHSA-qggq-wr6h-vhrg (x_refsource_CONFIRM)