PT-2026-52536

CVE-2026-54088

Published

2026-06-25

Updated

2026-07-30

Description by

CVSS 4.0

9.3

Critical

MetricsAV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Name of the Vulnerable Software and Affected Versions File Browser versions prior to 2.63.6

Description The Hook Authentication feature allows administrators to delegate login verification to an external shell command. User-supplied credentials, specifically the username and password variables, are interpolated into this command string using os.Expand without proper sanitization. An unauthenticated remote attacker can inject shell metacharacters into these fields at the login screen, leading to remote code execution (RCE) where the server executes arbitrary OS commands before authentication occurs.

Recommendations Update to version 2.63.6. As a temporary workaround, consider disabling the Hook Authentication feature to minimize the risk of exploitation.

Exploitability

Exploit

Fix

Impacts

Researchers

Saku0512

Vendors

Affected products

Weakness enumeration

CWE-78: Improper Neutralization of Special Elements used in an OS Command (\'OS Command Injection\')

CWE-88: Improper Neutralization of Argument Delimiters in a Command (\'Argument Injection\')

CWE-306: Missing Authentication for Critical Function