CVE-2026-28780
Critical · CVSS 9.8Apache HTTP Server mod_proxy_ajp — Heap-based Buffer Overflow (CWE-122, CWE-787)
- CVSS
- 9.8
- nvd
- EPSS
- 1.38%
- 69th pct
- KEV
- No
- Class
- oss containerizable
- CWE-122, CWE-787
Description
Heap-based Buffer Overflow vulnerability in mod_proxy_ajp of Apache HTTP Server. If 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. This issue affects Apache HTTP Server: through 2.4.66. Users are recommended to upgrade to version 2.4.67, which fixes the issue.
Search profile — drives PoC discovery
Symbols mod_proxy_ajpAJPajp_msgproxy_ajpap_proxy_ajp_requestajp_read_headerajp_marshalap_proxy_ajp_canon
Keywords CVE-2026-28780Apache HTTP Servermod_proxy_ajpheap buffer overflowAJP malicious message2.4.662.4.67out-of-bounds writeheap overflow ajp
Versions: through 2.4.66
Affected packages
| Bitnami | apache | 0 → 2.4.67 |
References
- https://httpd.apache.org/security/vulnerabilities_24.html
- http://www.openwall.com/lists/oss-security/2026/05/05/9
- https://access.redhat.com/errata/RHSA-2026:21391
- https://access.redhat.com/errata/RHSA-2026:21433
- https://access.redhat.com/errata/RHSA-2026:22140
- https://access.redhat.com/errata/RHSA-2026:27200
- https://access.redhat.com/errata/RHSA-2026:27201
- https://access.redhat.com/errata/RHSA-2026:36373
- https://access.redhat.com/errata/RHSA-2026:36831
- https://access.redhat.com/errata/RHSA-2026:36846
- https://access.redhat.com/errata/RHSA-2026:47046
- https://access.redhat.com/security/cve/CVE-2026-28780
Status: enriched · ingested 2026-06-30T06:00:22.000Z · profiled 2026-07-01T06:30:14.000Z