Cross-site scripting in Palo Alto PAN-OS - CVE-2026-0279
Published: July 10, 2026
Vulnerability identifier: #VU137310
CSH Severity: Medium
CVSS v4: 5.1 [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]
CVE-ID: CVE-2026-0279
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
Palo Alto PAN-OS
How to mitigate CVE-2026-0279
Install security update from vendor's website.
Palo Alto PAN-OS - addressed in versions 11.1.16, 11.2.13, 12.1.8