Detections
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Squid < 7.7 FTP Command Injection (SQUID-2026:9)
high Nessus Plugin ID 377051
Synopsis
The remote proxy server is affected by a command injection vulnerability.Description
The version of Squid on the remote host is prior to 7.7. It is, therefore, affected by a command injection vulnerability:- Due to an Improper Validation of Syntactic Correctness bug, Squid is vulnerable to a command injection attack against the FTP gateway. This problem allows a trusted client to perform command injection when accessing an ftp:// URL, allowing the client access to files, directories and features of the FTP server normally forbidden by Squid security policy. (CVE-2026-62846)
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.
Solution
Upgrade to Squid version 7.7 or later, or apply the patch referenced in the vendor advisory.See Also
Plugin Details
Severity: High
ID: 377051
File Name: squid_2026_9.nasl
Version: 1.1
Type: Remote
Family: Firewalls
Published: 11/6/2026
Updated: 11/6/2026
Configuration: Enable paranoid mode
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 4.9
Percentile: 58.25
CVSS v2
Risk Factor: Medium
Base Score: 6.8
Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:N/A:N
CVSS Score Source: CVE-2026-62846
CVSS v3
Risk Factor: High
Base Score: 7.7
Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Vulnerability Information
CPE: cpe:/a:squid-cache:squid
Required KB Items: installed_sw/Squid, Settings/ParanoidReport
Patch Publication Date: 8/24/2026
Vulnerability Publication Date: 9/12/2026
Reference Information
CVE: CVE-2026-62846