CVE-2026-26979

low-risk
Published 2026-02-26

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.

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
2
CVSS 2.7/10 Low
NETWORK / LOW complexity

Affected Products (2)

Affected Vendors

Discourse

References (1)

Vendor Advisory https://github.com/discourse/discourse/security/advisories/GHSA-9c7p-fqc5-c24f
21
/ 100
low-risk
Severity 14/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 7/34 · Low