CVE-2026-0266— PAN-OS: Stored Cross-Site Scripting (XSS) Vulnerability in the Web Interface
Quick assessment
Affected
Palo Alto Networks Cloud NGFW
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Palo Alto Networks PAN-OS是美国Palo Alto Networks公司的一套为其防火墙设备开发的操作系统。 Palo Alto Networks PAN-OS存在跨站脚本漏洞，该漏洞源于跨站脚本，可能导致恶意经过身份验证的管理员使用Web界面存储JavaScript有效载荷。
Affected Version Matrix 6
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Palo Alto Networks | Cloud NGFW | All |
unaffected |
| Palo Alto Networks | PAN-OS | 12.1.0< 12.1.5 |
affected |
11.2.0< 11.2.11 |
affected | ||
11.1.0< 11.1.14 |
affected | ||
10.2.0 |
affected | ||
| Palo Alto Networks | Prisma Access | All |
unaffected |
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I. Basic Information for CVE-2026-0266
Vulnerability Information
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Vulnerability Title
PAN-OS: Stored Cross-Site Scripting (XSS) Vulnerability in the Web Interface
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS: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
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
Palo Alto Networks PAN-OS 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Palo Alto Networks PAN-OS是美国Palo Alto Networks公司的一套为其防火墙设备开发的操作系统。 Palo Alto Networks PAN-OS存在跨站脚本漏洞，该漏洞源于跨站脚本，可能导致恶意经过身份验证的管理员使用Web界面存储JavaScript有效载荷。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Palo Alto Networks | Cloud NGFW | - | - |
|
| Palo Alto Networks | PAN-OS | 12.1.0 ~ 12.1.5 |
cpe:2.3:o:palo_alto_networks:pan-os:12.1.4:*:*:*:*:*:*:*
|
|
| Palo Alto Networks | Prisma Access | - | - |
|
II. Public POCs for CVE-2026-0266
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-0266 (1)
Same Patch Batch · Palo Alto Networks · 2026-06-10 · 9 CVEs total
| CVE-2026-0273 | 5.7 MEDIUM | PAN-OS: Authenticated Admin Command Injection Vulnerability via CLI or Web UI |
| CVE-2026-0272 | 5.6 MEDIUM | PAN-OS: Privilege Escalation (PE) Vulnerability in the Command Line Interface (CLI) |
| CVE-2026-0274 | Cortex XSOAR: Improper Validation of Credentials in CommvaultSecurityIQ integration | |
| CVE-2026-0271 | Prisma Access Agent: Local Privilege Escalation by Authorized Users | |
| CVE-2026-0270 | Cortex XSOAR: Path Traversal Vulnerability | |
| CVE-2026-0269 | PAN-OS: Denial of Service (DoS) in Tunnel Traffic Processing | |
| CVE-2026-0268 | Prisma Access Agent: Local Authenticated VPN Enforcement Bypass on Linux | |
| CVE-2026-0267 | GlobalProtect App: Information Exposure Vulnerability on macOS |
IV. Related Vulnerabilities
Same product: Cloud NGFW
-
CVE-2026-0308
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PAN-OS: Multiple Cross-Site Scripting (XSS) Vulnerabilities
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V. Comments for CVE-2026-0266
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