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CVE-2026-44186 Apache CVE debrief

CVE-2026-44186 is a HIGH severity vulnerability in Apache HTTP Server's mod_proxy_ftp module. The issue is caused by an infinite loop with an unreachable exit condition, which can be triggered by an attacker-controlled backend FTP server. The vulnerability affects Apache HTTP Server versions from 2.4.0 through 2.4.67. Users are recommended to upgrade to version 2.4.68, which fixes the issue. The CVSS score for this vulnerability is 7.3.

Vendor
Apache
Product
HTTP Server
CVSS
HIGH 7.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-08
Original CVE updated
2026-07-23
Advisory published
2026-06-08
Advisory updated
2026-07-23

Who should care

Users of Apache HTTP Server versions 2.4.0 through 2.4.67 should be aware of this vulnerability and take steps to mitigate it.

Technical summary

The vulnerability is caused by an infinite loop with an unreachable exit condition in the mod_proxy_ftp module of Apache HTTP Server. This can be triggered by an attacker-controlled backend FTP server.

Defensive priority

HIGH

Recommended defensive actions

  • Upgrade to Apache HTTP Server version 2.4.68 or later.
  • Refer to [ref-4](https://httpd.apache.org/security/vulnerabilities_24.html) for vendor advisory and mitigation information.
  • Refer to [ref-5](http://www.openwall.com/lists/oss-security/2026/06/08/13) for additional information.

Evidence notes

The CVE record [cve-org] and NVD detail [nvd] provide additional information about this vulnerability.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-44186 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-44186

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-44186 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-44186

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.