CVE-2026-33426

LOW

Discourse users can edit or synonymize hidden tags they can't see

Title source: cna

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.

References (1)

[X_Refsource_Confirm] https://github.com/discourse/discourse/security/advisories/GHSA-2289-4m46-2hxh

Scores

CVSS v3 3.5

EPSS 0.0002

EPSS Percentile 6.5%

Attack Vector NETWORK

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

Details

CWE

CWE-862

Status published

Products (5)

discourse/discourse 2026.3.0

discourse/discourse 2026.1.0 - 2026.1.2

discourse/discourse >= 2026.1.0-latest, < 2026.1.2

discourse/discourse >= 2026.2.0-latest, < 2026.2.1

discourse/discourse = 2026.3.0-latest

Published Mar 21, 2026

Tracked Since Mar 21, 2026