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Vulnerability · Published Jun 10, 2026 · Assigned by palo_alto

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

Low 1.1

In plain English

A low-severity cross-site scripting in Cloud NGFW from Palo Alto Networks. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 3% of all known vulnerabilities).

Severity (CVSS 4.0)1.1Low
Exploit odds (30 days)0.1%top 96.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

VendorProductVersions
Palo Alto Networks Cloud NGFW see references
Palo Alto Networks PAN-OS 12.1.0 – before 12.1.511.2.0 – before 11.2.1111.1.0 – before 11.1.1410.2.0
Palo Alto Networks Prisma Access see references

Weakness: CWE-79 · Vector: 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

References