---
id: CVE-2026-0266
title: >-
  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
summary: >-
  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-…
severity: medium
cvss: 4.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N'
cwe:
  - CWE-79
vendor: paloaltonetworks
product: pan-os
affected:
  - 'pan-os >= 10.2.0, < 11.1.14'
  - 'pan-os >= 11.2.0, < 11.2.11'
  - 'pan-os >= 12.1.0, < 12.1.5'
patched:
  - pan-os 12.1.5
published: '2026-06-10'
updated: '2026-07-13'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-0266'
references:
  - url: 'https://security.paloaltonetworks.com/CVE-2026-0266'
    label: psirt@paloaltonetworks.com
tags:
  - nvd
epss: 0.00138
epssPercentile: 0.03551
ingestedAt: '2026-07-13T13:27:18.057Z'
---

## Overview

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.

## Affected

- `pan-os >= 10.2.0, < 11.1.14`
- `pan-os >= 11.2.0, < 11.2.11`
- `pan-os >= 12.1.0, < 12.1.5`

## Remediation

Upgrade past the affected range:

- `pan-os 12.1.5`