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ALSA-2021:4257 Not scored

Moderate: httpd:2.4 security, bug fix, and enhancement update

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 AlmaLinux Release Notes linked from the References section.

Exploit probability Not scored
Published November 9, 2021
Required by Not available
Last source change February 4, 2026

02 / AFFECTED SOFTWARE

Affected packages

AlmaLinux:8 mod_http2
AlmaLinux:8 mod_md

03 / CONNECTIONS

Connected vulnerabilities

04 / EVIDENCE

Source records

Open Source Vulnerabilities ALSA-2021:4257

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 AlmaLinux Release Notes linked from the References section.

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05 / REFERENCES

Further evidence