{"id":"CVE-2026-63686","title":"A NULL pointer dereference in mod_xml2enc in Apache Software Foundation Apache HTTP Server before 2.4.69 on all platforms allows an untrusted backend server to cause a denial of service via a proxied response with a charset whose convers…","summary":"A NULL pointer dereference in mod_xml2enc in Apache Software Foundation Apache HTTP Server before 2.4.69 on all platforms allows an untrusted backend server to cause a denial of service via a proxied response with a charset whose convers…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-476"],"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-2026-63686","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":"2026-10-01T19:34:34.341515Z"},"ingestedAt":"2026-10-01T18:55:42.364Z","slug":"CVE-2026-63686","body":"## Overview\n\nA NULL pointer dereference in mod_xml2enc in Apache Software Foundation Apache HTTP Server before 2.4.69 on all platforms allows an untrusted backend server to cause a denial of service via a proxied response with a charset whose conversion partially succeeds then fails.\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":41,"depthScoreParts":{"impact":41.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":214661,"id":"CVE-2026-63686","ts":1790884800351,"field":"cvss","old":null,"new":"7.5"},{"seq":214660,"id":"CVE-2026-63686","ts":1790884800351,"field":"severity","old":"none","new":"high"}]}