CVE-2026-0256 MEDIUM

CVE-2026-0256: PAN-OS: Stored Cross-Site Scripting (XSS) Vulnerability in the Web Interface

Vendor Palo Alto Networks
Product PAN-OS
Weakness CWE-79 · XSS
Published May 13, 2026
Last update June 9, 2026
View on NVD All CVEs

CVSS base score

4.4/10
Attack vector Network
Attack complexity Low
Privileges required High
User interaction —
Confidentiality —
Integrity —

CVSS 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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

May 13, 2026 CVE published
June 9, 2026 Record updated