{"id":"CVE-2026-73636","title":"Authentication bypass by capture-replay in mod_auth_digest in Apache Software Foundation Apache HTTP Server 2.4.x on all platforms allows a man-in-the-middle (MITM) attacker to replay captured digest authentication credentials via crafte…","summary":"Authentication bypass by capture-replay in mod_auth_digest in Apache Software Foundation Apache HTTP Server 2.4.x on all platforms allows a man-in-the-middle (MITM) attacker to replay captured digest authentication credentials via crafte…","severity":"high","cvss":8.1,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-294"],"vendor":"apache","product":"http_server","affected":["http_server >= 2.4.0, < 2.4.69"],"patched":["http_server 2.4.69"],"published":"2026-10-01","updated":"2026-10-05","sourceUpdated":"2026-10-05T17:45:24.813","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-73636","references":[{"url":"https://httpd.apache.org/security/vulnerabilities_24.html","label":"security@apache.org"},{"url":"http://www.openwall.com/lists/oss-security/2026/10/01/27","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-73636.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-73636"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2544849"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-73636"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-73636"},{"url":"https://access.redhat.com/errata/RHSA-2026:74858"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00397,"epssPercentile":0.33764,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-01T19:43:35.472082Z"},"ingestedAt":"2026-10-01T18:55:42.365Z","slug":"CVE-2026-73636","body":"## Overview\n\nAuthentication bypass by capture-replay in mod_auth_digest in Apache Software Foundation Apache HTTP Server 2.4.x on all platforms allows a man-in-the-middle (MITM) attacker to replay captured digest authentication credentials via crafted requests that trigger garbage collection of the client's shared memory entry when AuthDigestNonceLifetime is set to 0.\n\nUsers are recommended to upgrade to version 2.4.69, which fixes this issue.\n\n## Affected\n\n- `http_server >= 2.4.0, < 2.4.69`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `http_server 2.4.69`\n\n## Vendor advisories\n\n- **Red Hat VEX** · Important · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat Hardened Images · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, … · updated 2026-10-02 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-73636.json)\n- **RHSA-2026:74858** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-10-02 · [advisory](https://access.redhat.com/errata/RHSA-2026:74858)","depth":"twilight","depthScore":45,"depthScoreParts":{"impact":44.6,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":214652,"id":"CVE-2026-73636","ts":1790884794593,"field":"cvss","old":null,"new":"8.1"},{"seq":214651,"id":"CVE-2026-73636","ts":1790884794593,"field":"severity","old":"none","new":"high"}]}