Vulnerability · Published Mar 12, 2026 · Assigned by redhat

CVE-2026-3234Mod_proxy_cluster: mod_proxy_cluster: response body corruption via crlf injection

Medium 4.3

In plain English

A medium-severity security flaw in Red Hat Enterprise Linux 10 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 26% of all known vulnerabilities).

Severity (CVSS 3.1)4.3Medium

Exploit odds (30 days)0.3%top 73.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

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.

Affected products (as reported)

Vendor	Product	Versions
Red Hat	Red Hat Enterprise Linux 10	see references
Red Hat	Red Hat Enterprise Linux 9	see references
Red Hat	Red Hat JBoss Core Services	see references
Red Hat	Red Hat JBoss Core Services	see references

Weakness: CWE-93 · Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

References

https://access.redhat.com/security/cve/CVE-2026-3234 vdb-entry, x_refsource_REDHAT
RHBZ#2442889 issue-tracking, x_refsource_REDHAT