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.

Project Subscriptions

Vendors Products
Mod Proxy Cluster Subscribe
Enterprise Linux Subscribe
Jboss Core Services Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.


Workaround

Restrict network access to the MCMP protocol port (typically 6666) for systems running Apache mod_proxy_cluster. Configure firewall rules to limit inbound connections to this port only from trusted internal or management networks. This action reduces the attack surface by preventing unauthorized remote access to the vulnerable service. A service reload or restart may be required for firewall changes to take full effect.

History

Thu, 12 Mar 2026 14:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 12 Mar 2026 11:15:00 +0000

Type Values Removed Values Added
Description No description is available for this CVE. 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.
Title mod_proxy_cluster: apache mod_proxy_cluster: Response body corruption via CRLF injection Mod_proxy_cluster: mod_proxy_cluster: response body corruption via crlf injection
First Time appeared Redhat
Redhat enterprise Linux
Redhat jboss Core Services
CPEs cpe:/a:redhat:jboss_core_services:1
cpe:/o:redhat:enterprise_linux:10
cpe:/o:redhat:enterprise_linux:9
Vendors & Products Redhat
Redhat enterprise Linux
Redhat jboss Core Services
References

Fri, 06 Mar 2026 15:30:00 +0000

Type Values Removed Values Added
First Time appeared Apache
Apache mod Proxy Cluster
Vendors & Products Apache
Apache mod Proxy Cluster

Thu, 05 Mar 2026 12:15:00 +0000

Type Values Removed Values Added
Description No description is available for this CVE.
Title mod_proxy_cluster: apache mod_proxy_cluster: Response body corruption via CRLF injection
Weaknesses CWE-93
References
Metrics threat_severity

None

cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N'}

threat_severity

Low


Projects

Sign in to view the affected projects.

cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-03-12T13:15:53.651Z

Reserved: 2026-02-26T00:17:46.458Z

Link: CVE-2026-3234

cve-icon Vulnrichment

Updated: 2026-03-12T13:15:49.984Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-03-12T11:15:57.147

Modified: 2026-03-12T21:07:53.427

Link: CVE-2026-3234

cve-icon Redhat

Severity : Low

Publid Date: 2026-02-26T00:00:00Z

Links: CVE-2026-3234 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-03-06T15:18:27Z

Weaknesses