Missing Release of Resource after Effective Lifetime in WS_FTP - CVE-2026-90870
Published: October 29, 2026
Vulnerability identifier: #VU158506
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-90870
CWE-ID: CWE-772
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to exhaust server resources and cause a denial of service.
The vulnerability exists due to failure to release resources after their effective lifetime in the Ad Hoc Transfer component of Progress WS_FTP Server when handling requests. A remote attacker can send repeated unauthenticated requests to exhaust server resources and cause a denial of service.
Affected software
WS_FTP
How to mitigate CVE-2026-90870
Install security update from vendor's website.
WS_FTP - addressed in versions 9.0.7, 10.0.4