RHSA-2026:21391 — Security Advisory

An update for httpd is now available for Red Hat Enterprise Linux 9.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

The httpd packages provide the Apache HTTP Server, a powerful, efficient, and extensible web server.

Security Fix(es):

• httpd: mod_proxy_ajp: heap-based buffer over-read and memory disclosure in ajp_parse_data() (CVE-2026-34059)

• httpd: mod_proxy_ajp: heap-based buffer over-read due to missing null-termination check (CVE-2026-34032)

• httpd: mod_proxy_ajp: off-by-one out-of-bounds reads in AJP getter functions (CVE-2026-33857)

• httpd: mod_authn_socache: NULL pointer dereference can cause a child process crash (CVE-2026-33007)

• Apache HTTP Server: mod_proxy_ajp: Apache HTTP Server mod_proxy_ajp: Arbitrary code execution via heap-based buffer overflow (CVE-2026-28780)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.