Information Disclosure in Discourse Open-Source Discussion Platform
CVE-2026-53960

5.3MEDIUM

Key Information:

Vendor

Discourse
Status
Discourse
Vendor
CVE Published:
17 August 2026

What is CVE-2026-53960?

Discourse, the open-source discussion platform, contains a vulnerability that allows for the exposure of hidden or unviewable content from first posts. This leaked information is made visible in the Q&A JSON-LD structured data, which can be accessed by unauthenticated visitors and search engine crawlers, potentially compromising sensitive discussions. The issue has been addressed in later versions: 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0.

Affected Version(s)

discourse < 2026.1.6 < 2026.1.6

discourse >= 2026.5.0-latest, < 2026.5.2 < 2026.5.0-latest, 2026.5.2

discourse >= 2026.6.0-latest, < 2026.6.1 < 2026.6.0-latest, 2026.6.1

References

https://github.com/discourse/discourse/security/advisorie...
x_refsource_CONFIRM

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.