PT-2026-26370 · Discourse · Discourse

Davidtaylorhq · CVE-2026-27934 · Published 2026-03-19 · Updated 2026-03-27

Positive Technologies (AI Summary)

CVSS v4.0

8.7

High

Base vector

AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA: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, an open-source discussion platform, is affected by an information disclosure issue. A lack of visibility checks within a user action API endpoint allows unauthorized users to access the title and post excerpt. The affected API endpoint is a user action endpoint. No information is available regarding the number of potentially affected devices or real-world exploitation of this issue.

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

Exploit

Fix

Weakness Enumeration

CWE-201

Related Identifiers

BIT-DISCOURSE-2026-27934

CVE-2026-27934

GHSA-824F-66WH-XX3G

Affected Products

Discourse

References · 7

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27934.json · Exploit
• https://github.com/discourse/discourse/security/advisories/GHSA-824f-66wh-xx3g · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-27934 · Security Note
• https://osv.dev/vulnerability/CVE-2026-27934 · Vendor Advisory
• https://osv.dev/vulnerability/BIT-discourse-2026-27934 · Vendor Advisory
• https://twitter.com/infoflowcloud/status/2034893049277395280 · Twitter Post
• https://twitter.com/CVEnew/status/2034891633209081986 · Twitter Post