RHSA-2021:4257 — Security Advisory
Red Hat Security Advisory: httpd:2.4 security, bug fix, and enhancement update
Severity
ModerateRed Hat Product Security
Products
Official CSAF product identity
Published · November 10, 2021
Updated · September 21, 2026
Topic
An update for the httpd:2.4 module is now available for Red Hat Enterprise Linux 8.
Red Hat Product Security has rated this update as having a security impact of Moderate. 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.
Description
The httpd packages provide the Apache HTTP Server, a powerful, efficient, and extensible web server.
Security Fix(es):
-
httpd: mod_session: NULL pointer dereference when parsing Cookie header (CVE-2021-26690)
-
httpd: Unexpected URL matching with 'MergeSlashes OFF' (CVE-2021-30641)
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.
Additional Changes:
For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.5 Release Notes linked from the References section.