Medium · published July 9, 2026
Multiple cross site scripting vulnerabilities in the User-ID™ Authentication Portal (aka Captive Portal) service, GlobalProtect™ gateway/portal features and Clientless VPN of Palo Alto Networks PAN-OS® software enables a malicious unauthenticated user to store or execute malicious JavaScript payload.
The security risk posed by this issue is minimized when the management interface and access to the User-ID™ Authentication Portal is restricted to only trusted internal IP addresses according to our recommended best practice deployment guidelines https://live.paloaltonetworks.com/t5/community-blogs/tips-amp-tricks-how-to-secure-the-management-access-of-your-palo/ba-p/464431 .
This issue is applicable to PAN-OS software on PA-Series and VM-Series firewalls and on Panorama (virtual and M-Series).
Cloud NGFW is not affected by this vulnerability.
| Product | Versions | Fixed in |
|---|---|---|
| paloaltonetworks/pan-os | ≥ 10.2.0, < 11.1.16 | 11.1.16 |
| paloaltonetworks/pan-os | ≥ 11.2.0, < 11.2.13 | 11.2.13 |
| paloaltonetworks/pan-os | ≥ 12.1.0, < 12.1.8 | 12.1.8 |