Vulnerability · Published Aug 17, 2026 · Assigned by GitHub_M

CVE-2026-53960Discourse: Hidden first-post excerpt is emitted in Q&A schema JSON-LD

Medium 5.3

In plain English

A medium-severity missing authorization in discourse from discourse. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 24% of all known vulnerabilities).

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)0.3%top 75.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
discourse	discourse	< 2026.1.6>= 2026.5.0-latest, < 2026.5.2>= 2026.6.0-latest, < 2026.6.1

Weakness: CWE-862 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

References

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