{"id":"CVE-2026-43951","summary":"Apache HTTP Server: OOB Read in `merge_response_headers` can cause crash","details":"Out-of-bounds Read vulnerability in Apache HTTP Server with mod_headers and mod_mime and multiple response languages.\n\nThis issue affects Apache HTTP Server: from 2.4.0 through 2.4.67.","aliases":["BIT-apache-2026-43951"],"modified":"2026-10-29T11:42:06.596570979Z","published":"2026-06-08T15:16:14.594Z","related":["ALSA-2026:34109","ALSA-2026:34355","ALSA-2026:41906","ALSA-2026:42828","ALSA-2026:59387","SUSE-SU-2026:22564-1","SUSE-SU-2026:2686-1","SUSE-SU-2026:2717-1","SUSE-SU-2026:2735-1","SUSE-SU-2026:2759-1","openSUSE-SU-2026:21235-1"],"database_specific":{"unresolved_ranges":[{"extracted_events":[{"strategy":"StandardRange","range":[{"introduced":"2.4.0"},{"last_affected":"2.4.67"}],"source":"AFFECTED_FIELD"}]}],"cna_assigner":"apache","cwe_ids":["CWE-125"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43951.json"},"references":[{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2026/06/08/10"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43951.json"},{"type":"ADVISORY","url":"https://httpd.apache.org/security/vulnerabilities_24.html"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43951"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/apache/httpd","events":[{"introduced":"da5873e80d6eee7a0838793bf68f1d0254745fbb"},{"last_affected":"1284d059e417308158be7594be7b14d321a2ac61"}],"database_specific":{"extracted_events":[{"range":[{"introduced":"2.4.0"},{"last_affected":"2.4.67"}],"source":"CPE_RANGE","cpe":"cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*"}]}}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-43951.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N"}]}