CVE-2026-0279
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/AU:N/R:U/V:D/RE:M/U:Amber
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Palo Alto Networks | Cloud NGFW | All | unaffected |
| Palo Alto Networks | PAN-OS | 12.1.0 < 12.1.8 | affected |
| Palo Alto Networks | PAN-OS | 11.2.0 < 11.2.13 | affected |
| Palo Alto Networks | PAN-OS | 11.1.0 < 11.1.16 | affected |
| Palo Alto Networks | PAN-OS | 10.2.0 < 10.2.18-h8 | affected |
| Palo Alto Networks | Prisma Access | 12.1.0 < 12.1.8 | affected |
| Palo Alto Networks | Prisma Access | 11.2.0 | affected |
| Palo Alto Networks | Prisma Access | 10.2.0 | affected |
Weaknesses
- CWE-79: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Workarounds
The vast majority of firewalls already follow Palo Alto Networks' and industry best practices. However, if you have not already, we strongly recommend that you secure access to your management interface according to our 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 . Specifically, you should restrict management interface access to only trusted internal IP addresses.
Review information about how to secure management access to your Palo Alto Networks firewalls:
https://live.paloaltonetworks.com/t5/community-blogs/tips-amp-tricks-how-to-secure-the-management-access-of-your-palo/ba-p/464431 https://live.paloaltonetworks.com/t5/community-blogs/tips-amp-tricks-how-to-secure-the-management-access-of-your-palo/ba-p/464431 * https://live.paloaltonetworks.com/t5/community-blogs/tips-amp-tricks-how-to-secure-the-management-access-of-your-palo/ba-p/464431 Palo Alto Networks LIVEcommunity article https://live.paloaltonetworks.com/t5/community-blogs/tips-amp-tricks-how-to-secure-the-management-access-of-your-palo/ba-p/464431
- Palo Alto Networks official and detailed technical documentation https://docs.paloaltonetworks.com/best-practices/10-1/administrative-access-best-practices/administrative-access-best-practices/deploy-administrative-access-best-practices
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: partial
References
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