PT-2026-37040 · Apache · Apache Http Server

Andrew Lacambra + 3 · Published 2026-05-05 · Updated 2026-05-05 · CVE-2026-28780

Positive Technologies (AI Summary)

Name of the Vulnerable Software and Affected Versions Apache HTTP Server versions prior to 2.4.67

Description A heap-based buffer overflow exists in the mod proxy ajp module. This occurs when mod proxy ajp connects to a malicious AJP server, which can send a specially crafted AJP message causing the server to write four attacker-controlled bytes beyond the end of a heap-based buffer.

Recommendations Upgrade to version 2.4.67.

Heap Based Buffer Overflow

Weakness Enumeration

CWE-122

Related Identifiers

CVE-2026-28780

Affected Products

Apache Http Server

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2026-28780 · Security Note
• https://httpd.apache.org/security/vulnerabilities_24.html · Vendor Advisory
• https://reddit.com/r/pwnhub/comments/1t4ek3l/apache_patches_critical_vulnerabilities_in_http · Reddit Post
• https://twitter.com/jedisct1/status/2051601437252055539 · Twitter Post
• http://openwall.com/lists/oss-security/2026/05/05/9 · Note
• https://twitter.com/CVEnew/status/2051793808644567252 · Twitter Post