SB20261110264 - Uncaught Exception in basic-ftp

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Main Vulnerability Database SB20261110264

SB20261110264 - Uncaught Exception in basic-ftp

Published: November 10, 2026 Updated: November 13, 2026

Security Bulletin ID SB20261110264
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Partial DoS

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Uncaught Exception (CVE-ID: CVE-2026-126345)

CWE-ID: CWE-248 - Uncaught Exception

CVSSv4: 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]


The vulnerability allows a remote attacker to cause a denial of service in applications using basic-ftp.

The vulnerability exists due to an uncaught exception in the MLSD directory-listing parser when an unguarded dictionary lookup resolves the __proto__ fact name to Object.prototype and attempts to call it as a function. A remote attacker can return "__proto__=x;type=file;size=10; evil.txt" from a malicious FTP server or inject it into a plaintext FTP listing to reject Client.list() operations and terminate the calling process if the rejection is unhandled.


Remediation

Install update from vendor's website.

References