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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.

PUBLISHED Reserved 2026-02-26 | Published 2026-03-12 | Updated 2026-03-12 | Assigner redhat




MEDIUM: 4.3CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Problem types

Improper Neutralization of CRLF Sequences ('CRLF Injection')

Product status

Default status
affected

Default status
affected

Default status
affected

Default status
affected

Timeline

2026-02-26:Reported to Red Hat.
2026-02-26:Made public.

Credits

Red Hat would like to thank Coty Sutherland (@csutherl) (IBM) for reporting this issue.

References

access.redhat.com/security/cve/CVE-2026-3234 vdb-entry

bugzilla.redhat.com/show_bug.cgi?id=2442889 (RHBZ#2442889) issue-tracking

cve.org (CVE-2026-3234)

nvd.nist.gov (CVE-2026-3234)

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