CVE-2026-55704 — Discourse: Shared-draft titles and excerpts leak through group post serialization

Description (CNA)

Discourse is an open-source discussion platform. Prior o 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0, users who were allowed to view a group’s activity, but were not permitted to see shared drafts, could still receive shared-draft entries through the group posts and group mentions endpoints. This could disclose shared-draft topic titles and post excerpt/content, resulting in an information disclosure of unpublished draft material. This issue is fixed in versions 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0.

Affected (CNA)

Vendor / product	Versions
discourse / discourse	affected < 2026.1.6; affected >= 2026.5.0-latest, < 2026.5.2; affected >= 2026.6.0-latest, < 2026.6.1

CWE

CWE-862

References

https://github.com/discourse/discourse/security/advisories/GHSA-fxw4-38v9-76v8

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.