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Description

Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, users with tag-editing permissions could edit and create synonyms for tags hidden in restricted tag groups, even if they lacked visibility into those tags. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. No known workarounds are available.

PUBLISHED Reserved 2026-03-19 | Published 2026-03-20 | Updated 2026-03-24 | Assigner GitHub_M




LOW: 3.5CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:N

Problem types

CWE-862: Missing Authorization

Product status

>= 2026.1.0-latest, < 2026.1.2
affected

>= 2026.2.0-latest, < 2026.2.1
affected

= 2026.3.0-latest
affected

References

github.com/...course/security/advisories/GHSA-2289-4m46-2hxh

cve.org (CVE-2026-33426)

nvd.nist.gov (CVE-2026-33426)

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