XSS in Palo Alto Networks PAN-OS UI Captures Authenticated Admin Payloads
CVE-2026-0266 Published on June 10, 2026
PAN-OS: Stored Cross-Site Scripting (XSS) Vulnerability in the Web Interface
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.
Timeline
Initial publication.
Weakness Type
What is a XSS Vulnerability?
The software does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
CVE-2026-0266 has been classified to as a XSS vulnerability or weakness.
Products Associated with CVE-2026-0266
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Affected Versions
Palo Alto Networks Cloud NGFW:- Version All is unaffected.
- Version 12.1.0 and below 12.1.5 is affected.
- Version 11.2.0 and below 11.2.11 is affected.
- Version 11.1.0 and below 11.1.14 is affected.
- Version 10.2.0 is affected.
- Version All is unaffected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.