CVE-2026-28780 Details
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.
A heap-based buffer overflow vulnerability has been identified in the mod_proxy_ajp module of Apache HTTP Server. This vulnerability exists in versions through 2.4.66. When mod_proxy_ajp connects to a malicious AJP server, the server can send a crafted AJP message that exploits this vulnerability. The malicious message can cause mod_proxy_ajp to write four bytes, controlled by the attacker, beyond the end of a heap buffer. This vulnerability could potentially be exploited to execute arbitrary code or cause a denial-of-service condition by crashing the server.
Users are advised to upgrade to Apache HTTP Server version 2.4.67, which addresses this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed May 6, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-122 | Heap-based Buffer Overflow | [email protected] |
| CWE-787 | Out-of-bounds Write | redhat-SADP |
Affected Products
| Product | Versions |
|---|---|
| apache http server | < 2.4.67 |
CPE
Remediation
| |
Change History
17 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 14, 2026 | CVE Modified | redhat-SADP |
| Sep 10, 2026 | CVE Modified | redhat-SADP |
| Sep 2, 2026 | CVE Modified | redhat-SADP |
| Sep 2, 2026 | CVE Modified | CVE |
| Sep 2, 2026 | CVE Modified | [email protected] |
| Jul 28, 2026 | CVE Modified | redhat-SADP |
| Jul 25, 2026 | CVE Translated | [email protected] |
| Jul 15, 2026 | CVE Modified | redhat-SADP |
| Jul 9, 2026 | CVE Modified | redhat-SADP |
| Jul 8, 2026 | CVE Modified | redhat-SADP |
| Jun 30, 2026 | CVE Modified | redhat-SADP |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 6, 2026 | Initial Analysis | [email protected] |
| May 6, 2026 | CVE Modified | CISA-ADP |
| May 5, 2026 | CVE Modified | CVE |
| May 5, 2026 | New CVE Received | [email protected] |