CVE-2026-33424

low-risk
Published 2026-03-21

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.

Do I need to act?

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0.04% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.9/10 Medium
ADJACENT_NETWORK / HIGH complexity

Affected Products (2)

Affected Vendors

Discourse

References (1)

Vendor Advisory https://github.com/discourse/discourse/security/advisories/GHSA-hgcp-p7hq-cwxw
22
/ 100
low-risk
Severity 15/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 7/34 · Low