CVE-2026-0266
Last modified
CVE-2026-0266 is a medium-severity vulnerability rated 4.8/10 on the CVSS scale. 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.. EPSS estimates a 0.13% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:N/R:U/V:D/RE:M/U:Amber
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Paloaltonetworks | Pan-Os | >= 10.2.0, < 11.1.14 |
| Paloaltonetworks | Pan-Os | >= 11.2.0, < 11.2.11 |
| Paloaltonetworks | Pan-Os | >= 12.1.0, < 12.1.5 |
References
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2026-0266?
How severe is CVE-2026-0266?
How do I fix CVE-2026-0266?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-0259An arbitrary File Read and Delete Vulnerability in Palo Alto…8.8
- CVE-2026-0261Multiple command injection vulnerabilities in Palo Alto Netw…7.2
- CVE-2026-0262Multiple denial of service vulnerabilities in Palo Alto Netw…7.5
- CVE-2026-0263A buffer overflow vulnerability in the IKEv2 processing of P…9.8
- CVE-2026-0264A buffer overflow vulnerability in the DNS proxy and DNS Ser…9.8
- CVE-2026-0265An authentication bypass vulnerability in Palo Alto Networks…8.1
- CVE-2026-0267An information exposure vulnerability in the Palo Alto Netwo…5.5
- CVE-2026-0268A security control bypass vulnerability in Prisma Access Age…4.4
- CVE-2026-0269A memory corruption vulnerability in the processing of tunne…5.7
- CVE-2026-0270A path traversal vulnerability in Palo Alto Networks Cortex …7.5
- CVE-2026-0271A privilege escalation (PE) vulnerability in the Palo Alto N…7.8
- CVE-2026-0272A privilege escalation vulnerability in Palo Alto Networks P…7.2
Are you affected by CVE-2026-0266?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST