# CVE-2026-44631: Apache HTTP Server buffer underwrite in ap_regname via configuration

Source: https://junglewise.ai/threats/cve-2026-44631-apache-http-server-buffer-underwrite-in-ap-regname-via  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-08. Updated: 2026-06-08  
License: CC BY 4.0 with a link back

CVE-2026-44631 · Severity: info · Published 2026-06-08

Apache HTTP Server is a widely used web server for hosting websites and applications. A vulnerability exists where specially crafted regular expressions in the server's configuration files can cause a memory error. This could potentially lead to service instability or crashes, though it requires the ability to modify the server's configuration.

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

## Quick answers

**Is CVE-2026-44631 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-44631 being exploited in the wild.

**How severe is CVE-2026-44631?** Informational severity, published 8 June 2026.

**Which products and versions are affected?** Apache HTTP Server 2.4.0 through 2.4.67.

**Is there a fix for CVE-2026-44631?** A patch was published on 2026-06-05: Fixed in 2.4.x branch Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-44631 attacked?** It is attacked with local access, in a hosted service.

**Am I affected by CVE-2026-44631?** 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.

## Technical details

A buffer underwrite (CWE-124) vulnerability exists in Apache HTTP Server's 'ap_regname' function due to a signed character overflow. The flaw is triggered by crafted regular expressions within the server configuration. An attacker with the ability to influence the configuration (such as a local user with .htaccess or main config access) could potentially cause a crash or memory corruption. The issue affects versions 2.4.0 through 2.4.67 and is resolved in version 2.4.68.

## Affected products

- Apache HTTP Server 2.4.0 through 2.4.67

## Timeline

- 2026-04-27: other: Reported to security team
- 2026-06-05: patched: Fixed in 2.4.x branch
- 2026-06-08: advisory: Public advisory released with version 2.4.68

## References

- [https://httpd.apache.org/security/vulnerabilities_24.html](https://httpd.apache.org/security/vulnerabilities_24.html)

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