{"id":"CVE-2026-28780","title":"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 …","summary":"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 …","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-122","CWE-787"],"vendor":"apache","product":"http_server","affected":["http_server < 2.4.67"],"patched":["http_server 2.4.67"],"published":"2026-05-05","updated":"2026-09-14","sourceUpdated":"2026-09-14T13:17:54.970","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-28780","references":[{"url":"https://httpd.apache.org/security/vulnerabilities_24.html","label":"security@apache.org"},{"url":"http://www.openwall.com/lists/oss-security/2026/05/05/9","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2026:21391","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:21433","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:22140","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:27200","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:27201","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:36373","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:36831","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:36846","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:47046","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:62165","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:66323","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:67152","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/security/cve/CVE-2026-28780","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2466913","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-28780.json","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-28780"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-28780"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"total","timestamp":"2026-05-06T15:49:38.049896Z"},"epss":0.01376,"epssPercentile":0.70428,"scores":{"nvd":9.8,"vendor":8.1,"adp":9.8},"ingestedAt":"2026-07-08T13:51:10.482Z","slug":"CVE-2026-28780","body":"## Overview\n\nHeap-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.\n\n## Affected\n\n- `http_server < 2.4.67`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `http_server 2.4.67`\n\n## Vendor advisories\n\n- **RHSA-2026:27200** · Red Hat · fixed in: Red Hat JBoss Core Services on RHEL 7 Server, Red Hat JBoss Core Services on RHEL 8 · released 2026-06-22 · [advisory](https://access.redhat.com/errata/RHSA-2026:27200)\n- **RHSA-2026:47046** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v. 10.0) · released 2026-07-28 · [advisory](https://access.redhat.com/errata/RHSA-2026:47046)\n- **RHSA-2026:21433** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10) · released 2026-05-27 · [advisory](https://access.redhat.com/errata/RHSA-2026:21433)\n- **RHSA-2026:22140** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 8) · released 2026-06-01 · [advisory](https://access.redhat.com/errata/RHSA-2026:22140)\n- **RHSA-2026:36846** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream AUS (v.8.4), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) · released 2026-07-08 · [advisory](https://access.redhat.com/errata/RHSA-2026:36846)\n- **RHSA-2026:36831** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream AUS (v.8.6), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6) · released 2026-07-08 · [advisory](https://access.redhat.com/errata/RHSA-2026:36831)\n- **RHSA-2026:36373** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream E4S (v.8.8), Red Hat Enterprise Linux AppStream TUS (v.8.8) · released 2026-07-07 · [advisory](https://access.redhat.com/errata/RHSA-2026:36373)\n- **RHSA-2026:66323** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream E4S (v.9.4) · released 2026-09-10 · [advisory](https://access.redhat.com/errata/RHSA-2026:66323)\n- **RHSA-2026:62165** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v.9.6) · released 2026-09-01 · [advisory](https://access.redhat.com/errata/RHSA-2026:62165)\n- **RHSA-2026:21391** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 9) · released 2026-05-27 · [advisory](https://access.redhat.com/errata/RHSA-2026:21391)\n- **RHSA-2026:27201** · Red Hat · fixed in: Red Hat JBoss Core Services 2.4.62.SP4 · released 2026-06-22 · [advisory](https://access.redhat.com/errata/RHSA-2026:27201)\n- **Red Hat VEX** · Important · affected: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7 · updated 2026-09-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-28780.json)\n- **RHSA-2026:67152** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream E4S (v.9.2) · released 2026-09-14 · [advisory](https://access.redhat.com/errata/RHSA-2026:67152)","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":53.9,"likelihood":0.3,"exploitation":0,"ransomware":0},"changes":[]}