Home

Description

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.

PUBLISHED Reserved 2025-11-03 | Published 2026-06-10 | Updated 2026-06-10 | Assigner palo_alto




LOW: 1.1CVSS: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

The risk is highest when you allow access to the management interface from external IP addresses on the internet.

LOW: 0.4CVSS:4.0/AV:L/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

You can greatly reduce the risk of exploitation by restricting access to a jump box that is the only system allowed to access the management interface. This will ensure that attacks can succeed only if they obtain privileged access through those specified IP addresses.

Problem types

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Product status

Default status
unaffected

All (custom)
unaffected

Default status
unaffected

12.1.0 (custom) before 12.1.5
affected

11.2.0 (custom) before 11.2.11
affected

11.1.0 (custom) before 11.1.14
affected

10.2.0 (custom)
affected

Default status
unaffected

All (custom)
unaffected

Timeline

2026-06-10:Initial publication.

Credits

Palo Alto Networks thanks Rajnish Gupta (internal reporter), James Otten (internal reporter), and Jasper Westerman of REQON B.V. for discovering and reporting this issue. other

References

security.paloaltonetworks.com/CVE-2026-0266 vendor-advisory

cve.org (CVE-2026-0266)

nvd.nist.gov (CVE-2026-0266)

Download JSON