# CVE-2026-44186: Apache HTTP Server infinite loop in mod_proxy_ftp

Source: https://junglewise.ai/threats/cve-2026-44186-apache-http-server-infinite-loop-in-mod-proxy-ftp  
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-2026-44186 · Severity: info · Published 2026-06-08

The Apache HTTP Server is a widely used web server for hosting websites and applications. A vulnerability in its FTP proxy module allows a malicious or compromised backend FTP server to trigger an infinite loop on the web server. This can lead to a denial-of-service (DoS) condition, making the web server unresponsive to legitimate users and potentially impacting business operations.

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

## Quick answers

**Is CVE-2026-44186 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-44186 being exploited in the wild.

**How severe is CVE-2026-44186?** 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-2026-44186?** A patch was published on 2026-06-05: Fixed in 2.4.x by r1935004 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-44186 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-44186?** 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 Loop with Unreachable Exit Condition ('Infinite Loop') vulnerability exists in the mod_proxy_ftp module of Apache HTTP Server. The flaw is located in the proxy_ftp_handler function and is triggered when the server interacts with an attacker-controlled or malicious backend FTP server. By sending a specifically crafted response, the backend server can cause the Apache process to enter an infinite loop, consuming CPU resources and leading to a denial-of-service (DoS). The issue is fixed in version 2.4.68.

## Affected products

- Apache HTTP Server 2.4.0 through 2.4.67

## Timeline

- 2026-04-27: disclosed: Reported to security team
- 2026-06-05: patched: Fixed in 2.4.x by r1935004
- 2026-06-08: advisory: Update 2.4.68 released

## References

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

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