{"id":"CVE-2026-28780","summary":"Apache HTTP Server: buffer overflow in mod_proxy_ajp via  ajp_msg_check_header()","details":"Heap-based Buffer Overflow vulnerability in mod_proxy_ajp of Apache HTTP Server.\nIf mod_proxy_ajp connects to a malicious AJP server this AJP server can send a malicious AJP message back to mod_proxy_ajp and cause it to write 4 attacker controlled bytes after the end of a heap based buffer.\n\nThis issue affects Apache HTTP Server: through 2.4.66.\n\nUsers are recommended to upgrade to version 2.4.67, which fixes the issue.","aliases":["BIT-apache-2026-28780"],"modified":"2026-05-10T11:51:11.581282Z","published":"2026-05-05T21:29:41.527Z","database_specific":{"cna_assigner":"apache","unresolved_ranges":[{"source":"AFFECTED_FIELD","extracted_events":[{"last_affected":"2.4.66"}]},{"source":"DESCRIPTION","extracted_events":[{"fixed":"2.4.66"}]}],"cwe_ids":["CWE-122"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/28xxx/CVE-2026-28780.json"},"references":[{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2026/05/05/9"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/28xxx/CVE-2026-28780.json"},{"type":"ADVISORY","url":"https://httpd.apache.org/security/vulnerabilities_24.html"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-28780"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/apache/httpd","events":[{"introduced":"0"},{"fixed":"e4a77ef6051b3fe22eafacbcf54855b178a0bddd"}],"database_specific":{"source":"DESCRIPTION","extracted_events":[{"introduced":"0"},{"fixed":"2.4.66"}]}}],"versions":["2.4.66-rc1-candidate"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-28780.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}