#VU126358 Allocation of Resources Without Limits or Throttling in basic-ftp
Published: April 16, 2026
Vulnerability identifier: #VU126358
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: N/A
CWE-ID: CWE-770
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
basic-ftp
basic-ftp
Software vendor:
patrickjuchli
patrickjuchli
Description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to allocation of resources without limits or throttling in Client.list() and StringWriter when processing directory listings from a remote FTP server. A remote attacker can send an extremely large or never-ending listing response to cause a denial of service.
Exploitation requires the victim to connect to a malicious or compromised FTP server and perform a directory listing operation.
Remediation
Install security update from vendor's website.