Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Paloaltonetworks | Pan-Os | >= 10.2.0, < 11.1.16 |
Related Weaknesses (CWE)
References
- https://security.paloaltonetworks.com/CVE-2026-0279Vendor Advisory
- https://cert-portal.siemens.com/productcert/html/ssa-104023.html
FAQ
What is CVE-2026-0279?
CVE-2026-0279 is a vulnerability with a CVSS score of 6.1 (MEDIUM). 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...
How severe is CVE-2026-0279?
CVE-2026-0279 has been rated MEDIUM with a CVSS base score of 6.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-0279?
Check the references section above for vendor advisories and patch information. Affected products include: Paloaltonetworks Pan-Os.