Cross-site scripting in Palo Alto PAN-OS - CVE-2026-0279

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Main Vulnerability Database Vulnerabilities #VU137310

Cross-site scripting in Palo Alto PAN-OS - CVE-2026-0279

Published: July 10, 2026


Vulnerability identifier: #VU137310
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Green
CVE-ID: CVE-2026-0279
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: Palo Alto Networks, Inc.
Affected software:
Palo Alto PAN-OS

Detailed vulnerability description

The vulnerability allows a remote attacker to execute malicious JavaScript payload.

The vulnerability exists due to cross-site scripting in the User-ID Authentication Portal, GlobalProtect gateway/portal features, and Clientless VPN when handling web content. A remote attacker can store or execute a malicious JavaScript payload to execute malicious JavaScript payload.

User interaction is required for exploitation.


How to mitigate CVE-2026-0279

Install security update from vendor's website.

Sources