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CVE-2026-0256

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

Published: May 13, 2026Updated: Jun 9, 2026 Sources: CVE List NVD BDUCWE-79

Patch Available

Description

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.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAccess Vector

Network

AC:LAccess Complexity

Low

Impact

C:LConfidentiality

L

I:HIntegrity

H

A:NAvailability

None

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Weaknesses

Affected Products

PAN-OS Palo Alto Networks Inc.Security Products

Cloud NGFW Palo Alto Networks Security Products

PAN-OS Palo Alto Networks Security Products

Prisma Access Palo Alto Networks Security Products

palo alto networks inc.commercialUSSecurity Productsaka paloaltonetworks, pan inc.

palo alto networkscommercialUSSecurity Productsaka pan-os, prisma access, cloud ngfw

Exploitability

0 exploit sources identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

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Official Patch Available

Workaround Available

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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques

Execution

Initial Access

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References

https://security.paloaltonetworks.com/CVE-2026-0256

security.paloaltonetworks.com

https://cert-portal.siemens.com/productcert/html/ssa-967325.html

cert-portal.siemens.com

Timeline

Published

May 13, 2026

Last Updated

Jun 9, 2026

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