RHSA-2026:34355: Moderate: mod_http2 security, bug fix, and enhancement update
Moderate: modhttp2 security, bug fix, and enhancement update
Other sources
The modh2 Apache httpd module implements the HTTP2 protocol (h2+h2c) on top of libnghttp2 for httpd 2.4 servers.Security Fix(es): httpd: modhttp2: Apache HTTP Server modhttp2: Use After Free vulnerability allows arbitrary code execution or denial of service. (CVE-2026-48913) httpd: Apache HTTP Server: Out-of-bounds Read in modheaders and modmime (CVE-2026-43951) Bug Fix(es) and Enhancement(s): address CVE-2026-43951 and CVE-2026-48913 in modhttp2 (JIRA:RHEL-188008) 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.
— Red Hat
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Patch JIRA:RHEL-188008
Event History
Frequently Asked Questions
What is the severity of RHSA-2026:34355?
The severity of RHSA-2026:34355 is classified as medium with a score of 4.
What does RHSA-2026:34355 address?
RHSA-2026:34355 addresses security vulnerabilities, bug fixes, and enhancements related to mod_http2.
How do I fix RHSA-2026:34355?
To fix RHSA-2026:34355, you should apply the latest updates provided by Red Hat for your specific version of Enterprise Linux.
Which systems are affected by RHSA-2026:34355?
RHSA-2026:34355 affects multiple architectures including ARM 64, x86_64, Power, and IBM z Systems within specified Red Hat Enterprise Linux versions.
When was RHSA-2026:34355 published?
RHSA-2026:34355 was published on July 1, 2026.