Uncaught Exception in basic-ftp - CVE-2026-126346
Published: November 10, 2026 / Updated: November 13, 2026
Vulnerability identifier: #VU164369
CSH Severity: Medium
CVSS v4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-126346
CWE-ID: CWE-248
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service by terminating the Node.js process.
The vulnerability exists due to an uncaught exception in basic-ftp control-socket response handlers when FTPContext.send() rejects control characters during login or resumed downloads. A remote attacker can supply a password or resumed-download remote path containing CR, LF, or NUL to an application accepting untrusted values to trigger an exception outside promise rejection handling and crash the process.
Affected software
basic-ftp
How to mitigate CVE-2026-126346
Install security update from vendor's website.
basic-ftp - update to 6.2.3