URL filtration bypass in Palo Alto PAN-OS

Published: 2022-02-09
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2022-0011
Exploitation vector Network
Public exploit N/A
Vulnerable software
Palo Alto PAN-OS
Operating systems & Components / Operating system

Vendor Palo Alto Networks, Inc.

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Incorrect Regular Expression

EUVDB-ID: #VU60481

Risk: Medium


CVE-ID: CVE-2022-0011

CWE-ID: CWE-185 - Incorrect Regular Expression

Exploit availability: No


The vulnerability allows a remote attacker to bypass URL filtration rules.

The vulnerability exists due to an error when processing forward slash (/), asterisk (*) and caret (^)  at the end of the hostname inside filtration rules added to the custom URL category list or to an external dynamic list (EDL) in a URL Filtering profile. As a result, unexpected domains can be blocked or allowed, resulting in a potential security issue.


Install updates from vendor's website.

Vulnerable software versions

Palo Alto PAN-OS: 8.1 - 8.1.20-h1, 9.0 - 9.0.15, 9.1 - 9.1.11-h3, 10.0.0 - 10.0.7, 10.1.0 - 10.1.2

CPE2.3 External links


Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?