What is CVE-2026-0266?

CVE-2026-0266 is a medium-severity vulnerability in Palo Alto Networks Cloud Ngfw, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2026-06-10.

How severe is CVE-2026-0266?

Medium severity. CVSS v3 base score is 4.8 out of 10.

XSS in Palo Alto Networks Cloud Ngfw

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-Se…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.001 (2.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N.

Affected products

Palo Alto Networks Cloud Ngfw — versions All
Palo Alto Networks Pan-os — versions 12.1.0, 11.2.0, 11.1.0
Palo Alto Networks Prisma Access — versions All
Paloaltonetworks Pan-os

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

psirt@paloaltonetworks.com (vendor-advisory, Vendor Advisory)
0b142b55-0307-4c5a-b3c9-f314f3fb7c5e

Frequently asked questions

What is CVE-2026-0266?: CVE-2026-0266 is a medium-severity vulnerability in Palo Alto Networks Cloud Ngfw, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2026-06-10.
How severe is CVE-2026-0266?: Medium severity. CVSS v3 base score is 4.8 out of 10.