CVE-2026-11873 Information disclosure in Red Hat Certificate System 9
Unauthenticated attackers can trigger Java stack trace disclosures and log amplification via malformed requests to the Dogtag CA REST endpoint.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-11873?
CVE-2026-11873 is a medium-severity vulnerability in Red Hat Certificate System 9, published on 1 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An Apache-proxied Dogtag CA REST endpoint exposed by IdM (POST /ca/rest/certrequests) returns HTTP 500 with internal Java stack traces for unauthenticated malformed requests. The same unauthenticated error path emits large multi-line stack traces into the CA debug log, creating a log-amplification resource exhaustion vector (disk growth and I/O contention) without requiring authentication.
Weakness: CWE-209
Which versions are affected by CVE-2026-11873?
How do I fix CVE-2026-11873?
No fix has been published for CVE-2026-11873 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-11873 being exploited?
There is no known exploitation of CVE-2026-11873 in the wild and no public exploit code.
Sources
Also known as GHSA-q8f6-8cj7-hxqf.