CVE-2026-56449: Apache HTTP Server mod_proxy_html out-of-bounds write

CVE-2026-56449 · Severity: high · CVSS 7.5 · Published 2026-10-01

Apache HTTP Server, a widely-used web server that handles HTTP requests for websites, contains a memory safety flaw in its mod_proxy_html module that processes HTTP responses. When an attacker sends a specially crafted HTTP response body, the module can crash the server process, causing a denial of service.

Technologies: Apache HTTP Server. Vendors: Apache.

Quick answers

Is CVE-2026-56449 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-56449 being exploited in the wild.
How severe is CVE-2026-56449?
High severity, with a CVSS score of 7.5, published 1 October 2026.
Which products and versions are affected?
Apache HTTP Server 2.4.0 through 2.4.68.
Is there a fix for CVE-2026-56449?
Yes: fixed in 2.4.69. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-56449 attacked?
It is attacked over the network, in a web application.
Am I affected by CVE-2026-56449?
Check whether you run Apache HTTP Server at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • Fixed in: 2.4.69

Technical details

An out-of-bounds write vulnerability exists in Apache HTTP Server's mod_proxy_html module when processing certain HTTP response bodies. The vulnerability is triggered during the dump_content function and affects versions 2.4.0 through 2.4.68. This is a memory corruption flaw that results in server process crashes.

Affected products

  • Apache HTTP Server 2.4.0 through 2.4.68

Timeline

  • 2026-06-14: disclosed
  • 2026-10-01: patched: version 2.4.69 released
  • 2026-10-01: advisory

References

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.