Low 1.3Published Jul 9, 2026

CVE-2026-0279PAN-OS: Multiple Cross-Site Scripting (XSS) Vulnerabilities

Updated under an hour ago (2026-10-19 04:00 UTC)

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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

Multiple cross site scripting vulnerabilities in the User-ID™ Authentication Portal (aka Captive Portal) service, GlobalProtect™ gateway/portal features and Clientless VPN of Palo Alto Networks PAN-OS® software enables a malicious unauthenticated user to store or execute malicious JavaScript payload. The security risk posed by this issue is minimized when the management interface and access to the User-ID™ Authentication Portal is restricted to only trusted internal IP addresses according to our recommended best practice deployment guidelines https://live.paloaltonetworks.com/t5/community-blogs/tips-amp-tricks-how-to-secure-the-management-access-of-your-palo/ba-p/464431 . This issue is applicable to PAN-OS software on PA-Series and VM-Series firewalls and on Panorama (virtual and M-Series). Cloud NGFW is not affected by this vulnerability.

CVSS: 1.3 LOW (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/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 15, 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 12.1.8; fixed at 12.1.8; from 11.2.0 before 11.2.13; fixed at 11.2.13; from 11.1.0 before 11.1.16; fixed at 11.1.16; from 10.2.0 before 10.2.18-h8; fixed at 10.2.18-h8, fixed at 10.2.16-h9, fixed at 10.2.13-h23, fixed at 10.2.10-h39, fixed at 10.2.7-h36	CNA record
Palo Alto Networks Prisma Access palo_alto_networks:prisma_access (from the name)	from 12.1.0 before 12.1.8; fixed at 12.1.8; 11.2.0; 10.2.0	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 11.1.16; from 11.2.0 before 11.2.13; from 12.1.0 before 12.1.8	NVD

References

https://security.paloaltonetworks.com/CVE-2026-0279vendor-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.