CVE-2026-33426CWE-862

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

Low · published March 20, 2026

CVSS v3.1
3.5
EPSS
0%
Percentile
19.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
3.5 · LOW
Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00282 · 19.6th percentile
Weakness
CWE-862 · Missing Authorization
Published
2026-03-20T23:14Z
EPSS history
Timeline
  • 20 MAR 23:14Z
    Discourse users can edit or synonymize hidden tags they can't see
    cvelistv5