CVE-2026-28780

CRITICAL

9.8

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.

CVE Details

CVSS v3.1 Score9.8

SeverityCRITICAL

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published5/5/2026

Last Modified5/6/2026

Sourcenvd

Honeypot Sightings0

Affected Products

apache:http_server

Weaknesses (CWE)

CWE-122

References

https://httpd.apache.org/security/vulnerabilities_24.html(security@apache.org)

http://www.openwall.com/lists/oss-security/2026/05/05/9(af854a3a-2127-422b-91ae-364da2661108)

IOC Correlations

No correlations recorded

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