ALSA-2021:4257

    Dashboard / Vulnerabilities / ALSA-2021:4257

    ALSA-2021:4257

    Published: 9 Nov 2021Last Modified: 4 Feb 2026

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

    Details: 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.

    References: https://errata.almalinux.org/8/ALSA-2021-4257.html, https://vulners.com/cve/CVE-2021-26690, https://vulners.com/cve/CVE-2021-30641

    Affected packages

    Package

    Name: mod_http2

    Purl: pkg:rpm/almalinux/mod_http2

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -1.15.7-3.module_el8.5.0+2609+b30d9eec

    Affected versions

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    ALSA-2021:4257 | CVE-DB