{"id":"CVE-2026-56154","title":"Use After Free vulnerability in Apache HTTP Server's mod_rewrite when using lookahead (%{LA-U:HTTP:...})\n\n\n\nThis issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.","summary":"Use After Free vulnerability in Apache HTTP Server's mod_rewrite when using lookahead (%{LA-U:HTTP:...})\n\n\n\nThis issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-416"],"vendor":"Apache Software Foundation","product":"Apache HTTP Server","affected":["apache_http_server >= 2.4.0 <= 2.4.68"],"published":"2026-10-01","updated":"2026-10-01","sourceUpdated":"2026-10-01T20:30:25.943","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-56154","references":[{"url":"https://httpd.apache.org/security/vulnerabilities_24.html","label":"security@apache.org"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"total","timestamp":"2026-10-01T19:05:26.006334Z"},"ingestedAt":"2026-10-01T18:55:42.362Z","slug":"CVE-2026-56154","body":"## Overview\n\nUse After Free vulnerability in Apache HTTP Server's mod_rewrite when using lookahead (%{LA-U:HTTP:...})\n\n\n\nThis issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":53.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":214687,"id":"CVE-2026-56154","ts":1790884822955,"field":"cvss","old":null,"new":"9.8"},{"seq":214686,"id":"CVE-2026-56154","ts":1790884822955,"field":"severity","old":"none","new":"critical"}]}