# CVE-2026-63292: Apache HTTP Server stack buffer overflow in mod_vhost_alias

Source: https://junglewise.ai/threats/cve-2026-63292-stack-based-buffer-overflow-in-mod-vhost-alias-in-apache-software  
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-2026-63292 · Severity: high · CVSS 7.5 · Published 2026-10-01

Apache HTTP Server, which hosts websites and applications, contains a stack buffer overflow vulnerability in its mod_vhost_alias module. An attacker can exploit this by sending an HTTP request with an oversized Host header, potentially crashing the server or executing arbitrary code. This affects servers running versions up to 2.4.68 that use VirtualDocumentRoot with hostname format specifiers.

Technologies: [Apache Software Foundation HTTP Server](https://junglewise.ai/threats/technologies/apache-software-foundation-http-server). Vendors: [Apache Software Foundation](https://junglewise.ai/threats/vendors/apache-software-foundation).

## Quick answers

**Is CVE-2026-63292 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-63292 being exploited in the wild.

**How severe is CVE-2026-63292?** High severity, with a CVSS score of 7.5, published 1 October 2026.

**Which products and versions are affected?** Apache Software Foundation HTTP Server 2.4.0 through 2.4.68.

**Is there a fix for CVE-2026-63292?** 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-2026-63292 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-63292?** Check whether you run Apache Software Foundation 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

Stack-based buffer overflow in mod_vhost_alias triggered when an HTTP request contains a Host header exceeding 8192 bytes, combined with VirtualDocumentRoot using hostname format specifiers and LimitRequestFieldSize configured above default. The vulnerability allows denial of service or arbitrary code execution via network attack requiring no authentication. A fix is available in version 2.4.69.

## Affected products

- Apache Software Foundation HTTP Server 2.4.0 through 2.4.68

## Timeline

- 2026-10-01: disclosed

## References

- [https://httpd.apache.org/security/vulnerabilities_24.html](https://httpd.apache.org/security/vulnerabilities_24.html)
- [http://www.openwall.com/lists/oss-security/2026/10/01/24](http://www.openwall.com/lists/oss-security/2026/10/01/24)

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