PAN-OS: Stored Cross-Site Scripting (XSS) Vulnerability in the Web Interface
Priority LOW 6CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- Passive
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-79.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00138 3rd percentileScored 2026-11-07
Fix Fixed Cloud NGFW (Palo Alto Networks): AllPAN-OS (Palo Alto Networks): 12.1.5, 11.2.11, 11.1.14+1 more product
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Palo Alto Networks | Cloud NGFW | — | All | Patch available | CNA |
| Palo Alto Networks | PAN-OS | 12.1.0 to before 12.1.5; 11.2.0 to before 11.2.11; 11.1.0 to before 11.1.14; 10.2.0 | 12.1.5, 11.2.11, 11.1.14 | Patch available | CNA |
| Palo Alto Networks | Prisma Access | — | All | Patch available | CNA |
- Cloud NGFW VendorPalo Alto Networks Affected — Fixed in All Patch available CNA
- PAN-OS VendorPalo Alto Networks Affected 12.1.0 to before 12.1.5; 11.2.0 to before 11.2.11; 11.1.0 to before 11.1.14; 10.2.0 Fixed in 12.1.5, 11.2.11, 11.1.14 Patch available CNA
- Prisma Access VendorPalo Alto Networks Affected — Fixed in All Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:* | 10.2.0 to before 11.1.14; 11.2.0 to before 11.2.11; 12.1.0 to before 12.1.5 | Vulnerable | CyberArk Software, a Palo Alto Networks Company |
- cpe:2.3:o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:* Versions 10.2.0 to before 11.1.14; 11.2.0 to before 11.2.11; 12.1.0 to before 12.1.5 Vulnerable ·CyberArk Software, a Palo Alto Networks Company
Remediation
- Fix · CNA Cloud NGFW (Palo Alto Networks) Fixed in All
- Fix · CNA PAN-OS (Palo Alto Networks) Fixed in 12.1.5, 11.2.11, 11.1.14
- Fix · CNA Prisma Access (Palo Alto Networks) Fixed in All
Timeline
- 2026-10-02 Threatist record created from CVE-2026-0266
- 2026-10-03 Alias added: GHSA-3xrx-45h3-29cm
References
More Palo Alto Networks vulnerabilities
- TI-2024-08782 Expedition: Unauthenticated OS Command Injection Vulnerability Leads to Firewall Credential Disclosure KEVCVSS 4.0CRITICAL 9.9
- TI-2024-03172 PAN-OS: Arbitrary File Creation Leads to OS Command Injection Vulnerability in GlobalProtect KEVCVSS 3.1CRITICAL 10.0
- TI-2020-01936 PAN-OS: Authentication Bypass in SAML Authentication KEVCVSS 3.1CRITICAL 10.0
- TI-2017-11675 Palo Alto Networks PAN-OS before 6.1.19, 7.0.x before 7.0.19, 7.1.x before 7.1.14, and… KEVCVSS 3.1CRITICAL 9.8
- TI-2026-00239 PAN-OS: Unauthenticated user initiated Buffer Overflow Vulnerability in User-ID™ Authentication Portal KEVCVSS 4.0CRITICAL 9.3
- TI-2024-08784 Expedition: SQL Injection Leads to Firewall Admin Credential Disclosure KEVCVSS 4.0CRITICAL 9.2
Sources
- CVE-2026-0266 · CVE Program
- CVE-2026-0266 · NVD
- FIRST EPSS
- GHSA-3xrx-45h3-29cm · GitHub Advisory Database · CC BY 4.0
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