CVE-2026-26979 NONE

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

Vendor Discourse
Product discourse
Weakness CWE-862 · Missing authorization
Published February 26, 2026
Last update February 26, 2026
View on NVD All CVEs

CVSS base score

0.0/10
Attack vector Network
Attack complexity Low
Privileges required High
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

February 26, 2026 CVE published
February 26, 2026 Record updated