PT-2026-22176 · Discourse · Discourse

Davidtaylorhq · Published 2026-02-26 · Updated 2026-03-03 · CVE-2026-26979

Positive Technologies (AI Summary)

CVSS v3.1

2.7

Low

Base vector

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

Name of the Vulnerable Software and Affected Versions Discourse versions prior to 2025.12.2 Discourse versions prior to 2026.1.1 Discourse versions prior to 2026.2.0

Description Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, Trust Level 4 (TL4) users were able to perform actions such as closing, archiving, and pinning topics within private categories to which they did not have explicit access.

Recommendations Update Discourse to version 2025.12.2 or later. Update Discourse to version 2026.1.1 or later. Update Discourse to version 2026.2.0 or later.

Exploit

Fix

Missing Authorization

Weakness Enumeration

CWE-862

Related Identifiers

BIT-DISCOURSE-2026-26979

CVE-2026-26979

GHSA-9C7P-FQC5-C24F

Affected Products

Discourse

References · 9

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/26xxx/CVE-2026-26979.json · Exploit
• https://github.com/discourse/discourse/security/advisories/GHSA-9c7p-fqc5-c24f · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-26979 · Security Note
• https://osv.dev/vulnerability/BIT-discourse-2026-26979 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-26979 · Vendor Advisory
• https://twitter.com/VulmonFeeds/status/2027131697704116277 · Twitter Post
• https://twitter.com/CVEnew/status/2027466664535826883 · Twitter Post
• https://t.me/CVEtracker/45883 · Telegram Post
• https://twitter.com/infoflowcloud/status/2027467964484653172 · Twitter Post