CVE-2026-53960 Discourse: Hidden first-post excerpt is emitted in Q&A schema JSON-LD
Unauthenticated attackers can view hidden first-post content via exposed JSON-LD structured data in Discourse forums.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-53960?
CVE-2026-53960 is a medium-severity vulnerability in discourse, published on 17 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
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.
Weakness: CWE-862
Which versions are affected by CVE-2026-53960?
1 open source package ship an affected version, including discourse.
| Package | Affected | Fixed in |
|---|---|---|
discourse Bitnami | All versions | 2026.1.6, 2026.5.2, 2026.6.1 |
How do I fix CVE-2026-53960?
Upgrade discourse to a fixed version for your release line: 2026.1.6, 2026.5.2 or 2026.6.1.
Is CVE-2026-53960 being exploited?
There is no known exploitation of CVE-2026-53960 in the wild and no public exploit code.
Sources
Also known as BIT-discourse-2026-53960, GHSA-j5j7-w5g3-43q8.