CVE-2026-27934 — Discourse leaks private topic title and post excerpt via user action API endpoint

CVE-2026-27934

Discourse leaks private topic title and post excerpt via user action API endpoint PUBLISHED

Description (CNA)

Discourse is an open-source discussion platform. Versions prior to 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 have a lack of visibility checks with a user action API endpoint that results in disclosure of the title and post excerpt to unauthorized users, leading to information disclosure. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. No known workarounds are available.

Affected (CNA)

Vendor / product	Versions
discourse / discourse	affected >= 2026.1.0-latest, < 2026.1.2; affected >= 2026.2.0-latest, < 2026.2.1; affected = 2026.3.0-latest

CWE

CWE-201

References

https://github.com/discourse/discourse/security/advisories/GHSA-824f-66wh-xx3g

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.