PT-2026-22196 · Discourse · Discourse

Davidtaylorhq · Published 2026-02-26 · Updated 2026-03-03 · CVE-2026-28219

Positive Technologies (AI Summary)

CVSS v3.1

4.3

Medium

Base vector

AV:N/AC:L/PR:L/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 An improper authorization check in the topic management logic allows authenticated users to modify privileged attributes of their topics. A regular user can elevate a topic’s status to a site-wide notice or banner by manipulating specific parameters in a PUT or POST request, bypassing intended administrative restrictions. This bypass occurs due to insufficient validation when processing requests related to topic attributes.

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

Weakness Enumeration

CWE-915

Related Identifiers

BIT-DISCOURSE-2026-28219

CVE-2026-28219

GHSA-8V26-9F7H-JC8X

Affected Products

Discourse

References · 7

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/28xxx/CVE-2026-28219.json · Exploit
• https://github.com/discourse/discourse/security/advisories/GHSA-8v26-9f7h-jc8x · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-28219 · Vendor Advisory
• https://osv.dev/vulnerability/BIT-discourse-2026-28219 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-28219 · Security Note
• https://twitter.com/CVEnew/status/2027466653089562750 · Twitter Post
• https://twitter.com/VulmonFeeds/status/2027234090437550410 · Twitter Post