PT-2026-26710 · Discourse · Discourse

Davidtaylorhq · Published 2026-03-20 · Updated 2026-03-27 · CVE-2026-33426

Positive Technologies (AI Summary)

CVSS v3.1

3.8

Low

Base vector

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

Name of the Vulnerable Software and Affected Versions Discourse versions prior to 2026.3.0-latest.1 Discourse versions prior to 2026.2.1 Discourse versions prior to 2026.1.2

Description Discourse is an open-source discussion platform. Users with tag-editing permissions could modify and create synonyms for tags within restricted tag groups, even without having direct visibility into those tags.

Recommendations Update to Discourse version 2026.3.0-latest.1. Update to Discourse version 2026.2.1. Update to Discourse version 2026.1.2.

Exploit

Fix

Missing Authorization

Weakness Enumeration

CWE-862

Related Identifiers

BIT-DISCOURSE-2026-33426

CVE-2026-33426

GHSA-2289-4M46-2HXH

Affected Products

Discourse

References · 6

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33426.json · Exploit
• https://github.com/discourse/discourse/security/advisories/GHSA-2289-4m46-2hxh · Vendor Advisory
• https://osv.dev/vulnerability/BIT-discourse-2026-33426 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-33426 · Security Note
• https://osv.dev/vulnerability/CVE-2026-33426 · Vendor Advisory
• https://twitter.com/CVEnew/status/2035262108653277511 · Twitter Post