CVE-2026-0256CWE-79

PAN-OS: Stored Cross-Site Scripting (XSS) Vulnerability in the Web Interface

Medium · published May 13, 2026

CVSS v4.0
4.4
EPSS
0%
Percentile
5.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
4.4 · MEDIUM
Vector
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
EPSS
0.00164 · 5.4th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-05-13T18:18Z
EPSS history
Timeline
  • 13 MAY 18:18Z
    PAN-OS: Stored Cross-Site Scripting (XSS) Vulnerability in the Web Interface
    cvelistv5