========================================================================== Ubuntu Security Notice USN-7968-1 January 19, 2026
apache2 vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 25.10 - Ubuntu 24.04 LTS - Ubuntu 22.04 LTS Summary: Several security issues were fixed in Apache HTTP Server. Software Description: - apache2: Apache HTTP server Details: It was discovered that the Apache HTTP Server incorrectly handled failed ACME certificate renewals. This could result in renewal attempts to be repeated without delays, possibly leading to a denial of service. (CVE-2025-55753) Anthony Parfenov discovered that the Apache HTTP Server would pass the query string to cmd directives when configured with Server Side Includes (SSI) enabled and mod_cgid. An attacker could possibly use this issue to execute arbitrary code. (CVE-2025-58098) Mattias Åsander discovered that the Apache HTTP Server incorrectly neutralized certain environment variables. This could result in unexpectedly superseding variables calculated by the server for CGI programs. (CVE-2025-65082) Mattias Åsander discovered that the Apache HTTP Server incorrectly handled AllowOverride FileInfo configurations when using mod_userdir with suexec. An attacker with access to use the RequestHeader directive in htaccess can cause some CGI scripts to run under an unexpected userid. (CVE-2025-66200) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 25.10 apache2 2.4.64-1ubuntu3.2 Ubuntu 24.04 LTS apache2 2.4.58-1ubuntu8.10 Ubuntu 22.04 LTS apache2 2.4.52-1ubuntu4.18 In general, a standard system update will make all the necessary changes. References: https://ubuntu.com/security/notices/USN-7968-1 CVE-2025-55753, CVE-2025-58098, CVE-2025-65082, CVE-2025-66200 Package Information: https://launchpad.net/ubuntu/+source/apache2/2.4.64-1ubuntu3.2 https://launchpad.net/ubuntu/+source/apache2/2.4.58-1ubuntu8.10 https://launchpad.net/ubuntu/+source/apache2/2.4.52-1ubuntu4.18
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