CVE-2026-0256

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.

At a glance

Exploitability

Can be exploited over the network with an admin-level account, but needs a user to act. High risk of data tampering.

Exploit odds

0.2% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2026-05-13 19:17 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-10-26 14:10 UTC Last updatedMost recent change to the record

Details

Published

2026-05-13 19:17 UTC

Last modified

2026-10-26 14:10 UTC

Exploit probability

0.2% · EPSS, next 30 days

Weakness

CWE-79 · Cross-site scripting

Record status

Analyzed

Affected

• Paloaltonetworks pan-os < 10.2.7
• Paloaltonetworks pan-os < 10.2.10
• Paloaltonetworks pan-os < 10.2.13
• Paloaltonetworks pan-os < 10.2.16
• Paloaltonetworks pan-os 10.2.7
• Paloaltonetworks pan-os 10.2.10
• Paloaltonetworks pan-os 10.2.13
• Paloaltonetworks pan-os 10.2.16

Attack profile CVSS 4.0 · 4.4

Attack vector

Network

Complexity

Low

Attack requirements

None

Privileges needed

High

User interaction

Passive

Confidentiality

Low

Integrity

High

Availability

None