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.
References
| Link | Resource |
|---|---|
| https://httpd.apache.org/security/vulnerabilities_24.html | Release Notes Vendor Advisory |
| http://www.openwall.com/lists/oss-security/2026/05/05/9 | Mailing List Third Party Advisory |
Configurations
History
06 May 2026, 20:31
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:* | |
| References | () https://httpd.apache.org/security/vulnerabilities_24.html - Release Notes, Vendor Advisory | |
| References | () http://www.openwall.com/lists/oss-security/2026/05/05/9 - Mailing List, Third Party Advisory | |
| First Time |
Apache http Server
Apache |
06 May 2026, 16:16
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 9.8 |
05 May 2026, 23:16
| Type | Values Removed | Values Added |
|---|---|---|
| References |
|
05 May 2026, 22:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-05-05 22:16
Updated : 2026-05-06 20:31
NVD link : CVE-2026-28780
Mitre link : CVE-2026-28780
CVE.ORG link : CVE-2026-28780
JSON object : View
Products Affected
apache
- http_server
CWE
CWE-122
Heap-based Buffer Overflow