CVE intelligence

CVE-2026-0266

Vulnerability intelligence

Published Jun 10, 2026Sources checked Oct 31, 2026

4.8MEDIUMCVSS out of 10

What this means

Review the available evidence

CVE-2026-0266 and is rated Medium severity with a CVSS score of 4.8. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.

What to do next

Remediation and response

Palo Alto Networks Security Advisories guidance

Vendor revision: Jun 10, 2026

Vendor remediation details

VERSION MINOR VERSION SUGGESTED SOLUTION Cloud NGFW No action needed. PAN-OS 12.1 12.1.2 through 12.1.4 Upgrade to 12.1.5 or later. PAN-OS 11.2 11.2.0 through 11.2.10 Upgrade to 11.2.11 or later. PAN-OS 11.1 11.1.0 through 11.1.13 Upgrade to 11.1.14 or later. PAN-OS 10.2 10.2.0 through 10.2.18 Upgrade to 11.1.14, 11.2.11, 12.1.5 or later. All older Upgrade to a supported fixed version. unsupported PAN-OS versions Prisma Access No action needed.

Vendor-listed releases

Cloud NGFW All
PAN-OS 12.1 >= 12.1.5
PAN-OS 11.2 >= 11.2.11
PAN-OS 11.1 >= 11.1.14
PAN-OS 10.2 None
Prisma Access All

CISA KEVNot listedBased on the latest collected catalog

EPSS0.1%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2026-0266?

A 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 affected by this vulnerability.

Source: NVD