CVE-2026-3234CWE-93

Mod_proxy_cluster: mod_proxy_cluster: response body corruption via crlf injection

Medium · published March 12, 2026

CVSS v3.1
4.3
EPSS
1%
Percentile
45.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
4.3 · MEDIUM
Vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00556 · 45.6th percentile
Weakness
CWE-93 · Improper Neutralization of CRLF Sequences ('CRLF Injection')
Published
2026-03-12T10:54Z
EPSS history
Timeline
  • 12 MAR 10:54Z
    Mod_proxy_cluster: mod_proxy_cluster: response body corruption via crlf injection
    cvelistv5