CVE-2026-33424
MEDIUM severity · CVSS 5.9 · Incorrect authorization
5.9CVSS MEDIUM
Summary
Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, an attacker can grant access to a private message topic through invites even after they lose access to that PM. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. No known workarounds are available.
Impact & exploitability
Attack vectorAdjacent
Attack complexityHigh
Privileges requiredHigh
User interactionRequired
Confidentiality impactHigh
Integrity impactHigh
Availability impactLow
Exploit probability (EPSS)0%
CVSS:3.1/AV:A/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:L
Affected products we track (1)
Recommendation
Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.