---
id: CVE-2026-0256
title: 'PAN-OS: Stored Cross-Site Scripting (XSS) Vulnerability in the Web Interface'
summary: >-
  A stored 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…
severity: medium
cvss: 4.4
cvssVector: >-
  CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/AU:N/R:U/V:D/RE:M/U:Amber
cvssSource: cna
cwe:
  - CWE-79
vendor: Palo Alto Networks
product: Cloud NGFW
affected:
  - cloud_ngfw
  - PAN-OS >= 12.1.0 < 12.1.7
  - PAN-OS >= 11.2.0 < 11.2.12
  - PAN-OS >= 11.1.0 < 11.1.15
  - PAN-OS >= 10.2.0 < 10.2.18-h6
  - prisma_access
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-05-13T18:59:29.074965Z'
published: '2026-05-13'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T01:11:24.782Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-0256'
references:
  - url: 'https://security.paloaltonetworks.com/CVE-2026-0256'
tags:
  - cve.org
epss: 0.00164
epssPercentile: 0.05267
ingestedAt: '2026-10-15T05:52:46.055Z'
---

## Overview

A stored 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 impacted by this vulnerability.

## Affected

- `cloud_ngfw`
- `PAN-OS >= 12.1.0 < 12.1.7`
- `PAN-OS >= 11.2.0 < 11.2.12`
- `PAN-OS >= 11.1.0 < 11.1.15`
- `PAN-OS >= 10.2.0 < 10.2.18-h6`
- `prisma_access`

## Remediation

VERSION           MINOR VERSION RANGE          SUGGESTED SOLUTION
Cloud NGFW                                     No action needed.
PAN-OS 12.1       12.1.5 through 12.1.6        Upgrade to 12.1.7 or later.
                  12.1.2 through 12.1.4-h*     Upgrade to 12.1.4-h5 or 12.1.7 or later.
PAN-OS 11.2       11.2.11 or later             Upgrade to 11.2.12 or later.
                  11.2.8 through 11.2.10-h*    Upgrade to 11.2.10-h6 or 11.2.12 or later.
                  11.2.5 through 11.2.7-h*     Upgrade to 11.2.7-h13 or 11.2.12 or later.
                  11.2.0 through 11.2.4-h*     Upgrade to 11.2.4-h17 or 11.2.12 or later.
PAN-OS 11.1       11.1.14 or later             Upgrade to 11.1.15 or later.
                  11.1.11 through 11.1.13-h*   Upgrade to 11.1.13-h5 or 11.1.15 or later.
                  11.1.8 through 11.1.10-h*    Upgrade to 11.1.10-h25 or 11.1.15 or later.
                  11.1.7 through 11.1.7-h*     Upgrade to 11.1.7-h6 or 11.1.15 or later.
                  11.1.5 through 11.1.6-h*     Upgrade to 11.1.6-h32 or 11.1.15 or later.
                  11.1.0 through 11.1.4-h*     Upgrade to 11.1.4-h33 or 11.1.15 or later.
PAN-OS 10.2       10.2.17 through 10.2.18-h*   Upgrade to 10.2.18-h6 or later.
                  10.2.14 through 10.2.16-h*   Upgrade to 10.2.16-h7 or 10.2.18-h6 or later.
                  10.2.11 through 10.2.13-h*   Upgrade to 10.2.13-h21 or 10.2.18-h6 or later.
                  10.2.8 through 10.2.10-h*    Upgrade to 10.2.10-h36 or 10.2.18-h6 or later.
                  10.2.0 through 10.2.7-h*     Upgrade to 10.2.7-h34 or 10.2.18-h6 or later.
All older                                      Upgrade to a supported fixed version.
unsupported
PAN-OS versions
Prisma Access                                  No action needed.

### Workarounds

Customers with a Threat Prevention subscription can block attacks for this vulnerability by enabling Threat ID 510020 (from Applications and Threats content version 9100-10044 and later).


For these Threat IDs to protect against attacks for this vulnerability:



 * Route incoming traffic for the MGT port through a DP port (https://docs.paloaltonetworks.com/best-practices/10-1/administrative-access-best-practices/administrative-access-best-practices/deploy-administrative-access-best-practices#id59206398-3dab-4b2f-9b4b-7ea500d036ba), e.g., enabling management profile on a DP interface for management access.
 * Replace the Certificate for Inbound Traffic Management (https://docs.paloaltonetworks.com/best-practices/10-1/administrative-access-best-practices/administrative-access-best-practices/deploy-administrative-access-best-practices#id112f7714-8995-4496-bbf9-781e63dec71c).
 * Decrypt inbound traffic to the management interface (https://docs.paloaltonetworks.com/best-practices/10-1/administrative-access-best-practices/administrative-access-best-practices/deploy-administrative-access-best-practices#idbbd82587-17a2-42b4-9245-d3714e1e13a2) so the firewall can inspect it (https://docs.paloaltonetworks.com/best-practices/10-1/administrative-access-best-practices/administrative-access-best-practices/deploy-administrative-access-best-practices#idbbd82587-17a2-42b4-9245-d3714e1e13a2).
 * Enable threat prevention on the inbound traffic to management services.