CVE-2026-33426
Discourse users can edit or synonymize hidden tags they can't see
CVSS Score
3.5
EPSS Score
0.0%
EPSS Percentile
5th
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.
| CWE | CWE-862 |
| Vendor | discourse |
| Product | discourse |
| Published | Mar 20, 2026 |
| Last Updated | Mar 24, 2026 |
Stay Ahead of the Next One
Get instant alerts for discourse discourse
Be the first to know when new low vulnerabilities affecting discourse discourse are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None
Affected Versions
discourse / discourse
>= 2026.1.0-latest, < 2026.1.2 >= 2026.2.0-latest, < 2026.2.1 = 2026.3.0-latest