CVE-2026-53960 PUBLISHED

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

Assigner: GitHub_M
Reserved: 11.06.2026 Published: 17.08.2026 Updated: 17.08.2026

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.

Metrics

CVSS 3.1

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

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	Low
Privileges Required	None	Integrity Impact	None
User Interaction	None	Availability Impact	None

CVSS 3.1

Product Status

Vendor	discourse
Product	discourse
Versions	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

References

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

Problem Types

CWE-862: Missing Authorization CWE