Discourse Shared-Draft I.D. via Group Endpoints <2026.7.0
CVE-2026-55704 Published on August 17, 2026
Discourse: Shared-draft titles and excerpts leak through group post serialization
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 groups 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 This could disclose shared-draft topic titles and post excerpt/content, resulting in an information disclosure of unpublished draft material.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.
Vulnerability Analysis
CVE-2026-55704 is exploitable with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality, a small impact on integrity and availability.
Weakness Type
What is an AuthZ Vulnerability?
The software does not perform an authorization check when an actor attempts to access a resource or perform an action.
CVE-2026-55704 has been classified to as an AuthZ vulnerability or weakness.
Products Associated with CVE-2026-55704
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Affected Versions
discourse:- Version < 2026.1.6 is affected.
- Version >= 2026.5.0-latest, < 2026.5.2 is affected.
- Version >= 2026.6.0-latest, < 2026.6.1 is affected.