CVE-2026-0266
PAN-OS: Stored Cross-Site Scripting (XSS) Vulnerability in the Web Interface
Description
A cross-site scripting (XSS) vulnerability in Palo Alto Networks PAN-OS® software enables a malicious authenticated administrator to store a JavaScript payload using the web interface. This issue is applicable to PAN-OS software on PA-Series and VM-Series firewalls and on Panorama (virtual and M-Series). Cloud NGFW and Prisma® Access are not affected by this vulnerability.
Weakness: CWE-79
Affected products
| Vendor | Product | Category | Matched by |
|---|---|---|---|
| Palo Alto Networks | PAN-OS | Firewall / NGFW | cna-assigner |
| Palo Alto Networks | Panorama | Network & Security Management | description |
Vendor-reported products (4)
- Palo Alto Networks · Cloud NGFW — vendor states not affected
- Palo Alto Networks · PAN-OS
- Palo Alto Networks · Prisma Access — vendor states not affected
- Siemens · RUGGEDCOM APE1808
Credit
Palo Alto Networks thanks Rajnish Gupta (internal reporter), James Otten (internal reporter), and Jasper Westerman of REQON B.V. for discovering and reporting this issue.
Vendor remediation
VERSION MINOR VERSION SUGGESTED SOLUTION Cloud NGFW No action needed. PAN-OS 12.1 12.1.2 through 12.1.4 Upgrade to 12.1.5 or later. PAN-OS 11.2 11.2.0 through 11.2.10 Upgrade to 11.2.11 or later. PAN-OS 11.1 11.1.0 through 11.1.13 Upgrade to 11.1.14 or later. PAN-OS 10.2 10.2.0 through 10.2.18 Upgrade to 11.1.14, 11.2.11, 12.1.5 or later. All older Upgrade to a supported fixed version. unsupported PAN-OS versions Prisma Access No action needed.