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

Source: https://junglewise.ai/threats/cve-2026-56449-out-of-bounds-write-vulnerability-in-apache-http-server-s-mod  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-01. Updated: 2026-10-05  
License: CC BY 4.0 with a link back

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](https://junglewise.ai/threats/technologies/http-server). Vendors: [Apache](https://junglewise.ai/threats/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

- [https://httpd.apache.org/security/vulnerabilities_24.html](https://httpd.apache.org/security/vulnerabilities_24.html)
- [http://www.openwall.com/lists/oss-security/2026/10/01/18](http://www.openwall.com/lists/oss-security/2026/10/01/18)

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