UpHeron
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Servers and applications

CVE-2026-28780

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,…

Severity
Critical 9.8
Published
5 May 2026
Last changed
14 Sept 2026
Added to UpHeron
17 Oct 2026
Fixed in
2.4.67
Sources
NVD

Affected software

SoftwareAffected versions
Apache HTTP ServerServers and applications · cpe:a:apache:http_server
  • Every version before 2.4.67

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2026-28780
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-28780