CVE-2026-0279

EUVD-2026-42682
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.
Cross-site Scripting
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
6.1 MEDIUM
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 26.51%
Affected Products (NVD)
VendorProductVersion
paloaltonetworkspan-os
10.2.0 ≤
𝑥
< 11.1.16
paloaltonetworkspan-os
11.2.0 ≤
𝑥
< 11.2.13
paloaltonetworkspan-os
12.1.0 ≤
𝑥
< 12.1.8
𝑥
= Vulnerable software versions
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
SiemensRUGGEDCOM APE1808
𝑥
< *
ADP
Common Weakness Enumeration
References
https://security.paloaltonetworks.com/CVE-2026-0279
https://cert-portal.siemens.com/productcert/html/ssa-104023.html