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CVE

CVE-2026-28780

9.8
CVSS 3.1
1
story
Severity
9.8 Critical · vendor score
Published
May 5, 2026
Weakness
CWE-122, CWE-787

What it is

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.

From the National Vulnerability Database

Decipher coverage · 1 story

Newest first ↑
  1. VulnerabilitiesSerious Apache Web Server Bug PatchedThe vulnerability (CVE-2026-23918) only affects version 2.4.66 and the Apache Software Foundation has released a fix for the bug in version 2.4.67.DENNIS FISHER · 1 MIN

Official references

4 sources

Registries

RegistryNVDScore, weakness and every referenceRegistryCVE.orgThe official CVE record

Advisories, fixes & analysis

Fixhttpd.apache.org/security/vulnerabilities_24.htmlAnalysisopenwall.com/lists/oss-security/2026/05/05/9