Low 1.1Published Jun 10, 2026

CVE-2026-0266PAN-OS: Stored Cross-Site Scripting (XSS) Vulnerability in the Web Interface

Updated under an hour ago (Oct 26, 2026, 3:00 PM ET)

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It affects Palo Alto Networks Cloud NGFW and 4 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Palo Alto Networks Cloud NGFW

Exploited in the last 30 days

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.

CVSS: 1.1 LOW (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/AU:N/R:U/V:D/RE:M/U:Amber
Weakness (CWE): CWE-79
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: palo_alto
NVD analysis: Modified
Record last updated: Oct 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Palo Alto Networks Cloud NGFW palo_alto_networks:cloud_ngfw (from the name)	all versions not affected	CNA record
Palo Alto Networks PAN-OS palo_alto_networks:pan-os	from 12.1.0 before 12.1.5; fixed at 12.1.5; from 11.2.0 before 11.2.11; fixed at 11.2.11; from 11.1.0 before 11.1.14; fixed at 11.1.14; 10.2.0	CNA record
Palo Alto Networks Prisma Access palo_alto_networks:prisma_access (from the name)	all versions not affected	CNA record
Siemens RUGGEDCOM APE1808 siemens:ruggedcom_ape1808 (from the name)	all versions	CISA ADP
paloaltonetworks pan-os paloaltonetworks:pan-os	from 10.2.0 before 11.1.14; from 11.2.0 before 11.2.11; from 12.1.0 before 12.1.5	NVD

References

References

https://security.paloaltonetworks.com/CVE-2026-0266	vendor-advisory
https://cert-portal.siemens.com/productcert/html/ssa-104023.html

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.