{"id":"CVE-2026-73637","title":"Use after free in mod_auth_digest in Apache Software Foundation Apache HTTP Server before 2.4.69 on all platforms allows an unauthenticated remote client to cause authentication state corruption via concurrent Digest authentication reque…","summary":"Use after free in mod_auth_digest in Apache Software Foundation Apache HTTP Server before 2.4.69 on all platforms allows an unauthenticated remote client to cause authentication state corruption via concurrent Digest authentication reque…","severity":"high","cvss":7.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","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-2026-73637","references":[{"url":"https://httpd.apache.org/security/vulnerabilities_24.html","label":"security@apache.org"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-10-01T19:42:16.346387Z"},"ingestedAt":"2026-10-01T18:55:42.365Z","slug":"CVE-2026-73637","body":"## Overview\n\nUse after free in mod_auth_digest in Apache Software Foundation Apache HTTP Server before 2.4.69 on all platforms allows an unauthenticated remote client to cause authentication state corruption via concurrent Digest authentication requests when AuthDigestNcCheck is enabled or AuthDigestNonceLifetime is set to 0.\n\nUsers are recommended to upgrade to version 2.4.69, which fixes this issue.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":40,"depthScoreParts":{"impact":40.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":214655,"id":"CVE-2026-73637","ts":1790884796593,"field":"cvss","old":null,"new":"7.3"},{"seq":214654,"id":"CVE-2026-73637","ts":1790884796593,"field":"severity","old":"none","new":"high"}]}