Infinite Loop in Apache HTTP Server mod_proxy_ftp proxy_ftp_handler
CVE-2026-44186 is a moderate-severity infinite loop vulnerability in Apache HTTP Server's mod_proxy_ftp module, specifically in the proxy_ftp_handler code path. When Apache HTTP Server is configured to proxy FTP traffic and interacts with an attacker-controlled backend FTP server, crafted backend responses can cause the handler to enter a loop with an unreachable exit condition. The issue affects Apache HTTP Server versions 2.4.0 through 2.4.67 and was fixed in 2.4.68.
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Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
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Remediation
Patch, then assume compromise.
Exploits
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Affected products & vendors
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
Recent activity
8 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A denial-of-service vulnerability in Apache HTTP Server mod_proxy_ftp that triggers an infinite loop via an attacker-controlled backend FTP server.
Apache HTTP Server mod_proxy_ftp vulnerability fixed in 2.4.68; the text indicates it relates to FTP proxy handling, but the exact impact is partially unreadable.
Buffer overflow vulnerability in Apache HTTP Server mod_proxy_ftp triggered by malformed FTP server responses.
An infinite loop vulnerability in Apache HTTP Server mod_proxy_ftp that can be triggered with an attacker-controlled backend FTP server.
The version that knows your environment.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.