CVE-2026-53960
MediumCVSS 5.3Summary
Discourse before versions 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0 leaked hidden or otherwise unviewable first-post content as an excerpt in the publicly-served Q&A (QAPage) JSON-LD structured data, exposing it to any unauthenticated visitor and to search-engine crawlers.
Risk Assessment
The risk is the disclosure of confidential content that should remain hidden, to public search results and any website visitor.
Recommendation
Upgrade Discourse immediately to one of the fixed versions: 2026.1.6, 2026.5.2, 2026.6.1, or 2026.7.0.
Original NVD description (English source)
Discourse is an open-source discussion platform. Prior to 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0, hidden or otherwise unviewable first-post content was leaked as an excerpt in the publicly-served Q&A (QAPage) JSON-LD structured data, exposing it to any unauthenticated visitor and to search-engine crawlers. This issue is fixed in versions 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0.