CVE-2026-53960

Discourse: Hidden first-post excerpt is emitted in Q&A schema JSON-LD

State: Published
Severity: 5.3 Medium
Published: Aug 17, 2026
Updated: Aug 17, 2026
Reserved: Jun 11, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	5.3 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N	GitHub_M

Weaknesses

CWE-862 Missing Authorization

Affected Products

Product	Versions
discoursediscourse	< 2026.1.6Affected >= 2026.5.0-latest, < 2026.5.2Affected >= 2026.6.0-latest, < 2026.6.1Affected

References

https://github.com/discourse/discourse/security/advisories/GHSA-j5j7-w5g3-43q8

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