CVE-2026-3234 Mod_proxy_cluster: mod_proxy_cluster: response body corruption via crlf injection
Remote attackers can corrupt INFO endpoint responses via CRLF injection in mod_proxy_cluster without authentication, affecting Red Hat JBoss Core Services.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-3234?
CVE-2026-3234 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, published on 12 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A flaw was found in mod_proxy_cluster. This vulnerability, a Carriage Return Line Feed (CRLF) injection in the decodeenc() function, allows a remote attacker to bypass input validation. By injecting CRLF sequences into the cluster configuration, an attacker can corrupt the response body of INFO endpoint responses. Exploitation requires network access to the MCMP protocol port, but no authentication is needed.
Weakness: CWE-93
Which versions are affected by CVE-2026-3234?
How do I fix CVE-2026-3234?
No fix has been published for CVE-2026-3234 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-3234 being exploited?
There is no known exploitation of CVE-2026-3234 in the wild and no public exploit code.
Sources
Also known as GHSA-rxq8-r4ww-hxv7.