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CVE-2026-3234

Mod_proxy_cluster: mod_proxy_cluster: response body corruption via crlf injection

CVSS 4.3 MEDIUMEPSS 0.3%CWE-93
Vexday Risk Score
13Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS 4.3EPSS 0.3%KEV nãoPoC Nuclei Metasploit Patch
Lifecycle
12 Mar 2026Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
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.
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

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