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CVE-2026-0279

PAN-OS: Multiple Cross-Site Scripting (XSS) Vulnerabilities

MEDIUM
6.1
CVSS Score
Published: July 9, 2026 at 07:08 PM UTC
Updated: October 15, 2026 at 01:11 AM UTC
4 products affected across 3 vendorsPAN-OSpan-osPrisma Access

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Severity
MEDIUM6.1
Exploit prediction
EPSS 0.8%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

pan-os· Palo Alto Networks
95%
10.2.010.2.110.2.1010.2.1110.2.1210.2.1310.2.1410.2.1510.2.1610.2.1710.2.1810.2.210.2.310.2.410.2.510.2.610.2.710.2.810.2.911.1.011.1.111.1.1011.1.1111.1.1211.1.1311.1.1411.1.1511.1.211.1.311.1.411.1.511.1.611.1.811.1.911.2.011.2.111.2.1011.2.1111.2.1211.2.211.2.311.2.411.2.511.2.611.2.711.2.811.2.912.1.212.1.312.1.412.1.512.1.612.1.7
PAN-OS· Palo Alto Networks
95%
10.2.0 ≤ v < 10.2.18-h810.2.0 ≤ v < 11.1.1611.1.0 ≤ v < 11.1.1611.2.0 ≤ v < 11.2.1312.1.0 ≤ v < 12.1.810.2.011.1.011.2.012.1.0
Affected range stops below 10.2.18-h8, so it looks safe — our inference, not a vendor statement
Affected range stops below 11.1.16, so it looks safe — our inference, not a vendor statement
Affected range stops below 11.2.13, so it looks safe — our inference, not a vendor statement
Affected range stops below 12.1.8, so it looks safe — our inference, not a vendor statement
Prisma Access· Palo Alto Networks
90%
12.1.0 ≤ v < 12.1.810.2.011.2.012.1.0
Affected range stops below 12.1.8, so it looks safe — our inference, not a vendor statement
RUGGEDCOM APE1808 Firmware· Siemens
60%
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

Vendor Advisory
Source: cverecord
https://security.paloaltonetworks.com/CVE-2026-0279
Source: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
https://cert-portal.siemens.com/productcert/html/ssa-104023.html

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.1MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-79

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