CVE-2026-0308

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

Published Sep 10, 2026 CVSS 4.0 · 0.4 Low EPSS < 1% KEV · Not listed

Description

A stored cross-site scripting (XSS) vulnerability in Palo Alto Networks PAN-OS® software enables a malicious authenticated administrator to store or execute 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

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Palo Alto Networks

Cloud NGFW

unaffected

Version	Status	Constraints
`All`	unaffected	—

Palo Alto Networks

PAN-OS

unaffected

Version	Status	Constraints
`12.2.0`	unaffected	< 12.2.3
`12.1.0`	affected	< 12.1.10
`11.2.0`	affected	< 11.2.13-h2
`11.1.0`	affected	< 11.1.16-h2

Palo Alto Networks

Prisma Access

affected

Version	Status	Constraints
`All`	unaffected	< 12.1.4-h10

No data.

Vendor Product Versions

Palo Alto Networks

Cloud Ngfw

Version	Status	Scheme	Platform
`[0,*]`	unaffected	generic	—

Palo Alto Networks

Pan-os

Version	Status	Scheme	Platform
`[12.2.0,12.2.3)`	unaffected	semver	—
`[12.1.0,12.1.10)`	affected	semver	—
`[11.2.0,11.2.13-h2)`	affected	semver	—
`[11.1.0,11.1.16-h2)`	affected	semver	—

Palo Alto Networks

Prisma Access

Version	Status	Scheme	Platform
`[0,*]`	unaffected	generic	—

Remediation

Vendor Workaround

No known workarounds exist for this issue. Customers with a Threat Prevention subscription are provided with limited coverage against this vulnerability by enabling Threat ID 510040 and 510041 (from Applications and Threats content version 9145-10233 and later). For these Threat IDs to protect against attacks for this vulnerability: * Route incoming traffic for the MGT port through a DP port https://docs.paloaltonetworks.com/best-practices/10-1/administrative-access-best-practices/administrative-access-best-practices/deploy-administrative-access-best-practices#id59206398-3dab-4b2f-9b4b-7ea500d036ba , e.g., enabling management profile on a DP interface for management access. * Replace the Certificate for Inbound Traffic Management https://docs.paloaltonetworks.com/best-practices/10-1/administrative-access-best-practices/administrative-access-best-practices/deploy-administrative-access-best-practices#id112f7714-8995-4496-bbf9-781e63dec71c . * Decrypt inbound traffic to the management interface so the firewall can inspect it https://docs.paloaltonetworks.com/best-practices/10-1/administrative-access-best-practices/administrative-access-best-practices/deploy-administrative-access-best-practices#idbbd82587-17a2-42b4-9245-d3714e1e13a2 . * Enable threat prevention on the inbound traffic to management services. Please note that this Threat ID requires SSL Decryption.

Tracking

Advisories

No advisories available

Metrics

Attack Vector Adjacent Network

Attack Complexity Low

Privileges Required High

Attack Requirements None

User Interaction Passive

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.513% probability within 30 days)

Exploitation none

Automatable no

Technical Impact partial

References

Link	Providers
https://cert-portal.siemens.com/productcert/html/ssa-104023.html
https://security.paloaltonetworks.com/CVE-2026-0308

History

Oct 15, 2026 2:30 AM Added references View changes

Type	Values Removed	Values Added
References		https://cert-portal.siemens.com/productcert/html/ssa-104023.html

Sep 11, 2026 12:30 PM First appearance in the feed. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Palo Alto Networks cloud Ngfw Palo Alto Networks prisma Access
Vendors & Products		Palo Alto Networks cloud Ngfw Palo Alto Networks prisma Access

Sep 10, 2026 2:30 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Sep 10, 2026 6:00 AM Description updated. Title updated. First appearance in the feed. Weaknesses updated. Affected versions updated. Affected vendors updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		A stored cross-site scripting (XSS) vulnerability in Palo Alto Networks PAN-OS® software enables a malicious authenticated administrator to store or execute 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.
Title		PAN-OS: Stored Cross-Site Scripting (XSS) Vulnerability in the Web Interface
First Time appeared		Palo Alto Networks Palo Alto Networks pan-os
Weaknesses		CWE-79
CPEs		cpe:2.3:o:palo_alto_networks:pan-os:::::::: cpe:2.3:o:palo_alto_networks:pan-os:11.1.0:::::::* cpe:2.3:o:palo_alto_networks:pan-os:11.1.10:::::::* cpe:2.3:o:palo_alto_networks:pan-os:11.1.11:::::::* cpe:2.3:o:palo_alto_networks:pan-os:11.1.12:::::::* cpe:2.3:o:palo_alto_networks:pan-os:11.1.13:::::::* cpe:2.3:o:palo_alto_networks:pan-os:11.1.14:::::::* cpe:2.3:o:palo_alto_networks:pan-os:11.1.15:::::::* cpe:2.3:o:palo_alto_networks:pan-os:11.1.16:-:::::: cpe:2.3:o:palo_alto_networks:pan-os:11.1.16:h1:::::: cpe:2.3:o:palo_alto_networks:pan-os:11.1.1:::::::* cpe:2.3:o:palo_alto_networks:pan-os:11.1.2:::::::* cpe:2.3:o:palo_alto_networks:pan-os:11.1.3:::::::* cpe:2.3:o:palo_alto_networks:pan-os:11.1.4:::::::* cpe:2.3:o:palo_alto_networks:pan-os:11.1.5:::::::* cpe:2.3:o:palo_alto_networks:pan-os:11.1.6:::::::* cpe:2.3:o:palo_alto_networks:pan-os:11.1.8:::::::* cpe:2.3:o:palo_alto_networks:pan-os:11.1.9:::::::* cpe:2.3:o:palo_alto_networks:pan-os:11.2.0:::::::* cpe:2.3:o:palo_alto_networks:pan-os:11.2.10:::::::* cpe:2.3:o:palo_alto_networks:pan-os:11.2.11:::::::* cpe:2.3:o:palo_alto_networks:pan-os:11.2.12:::::::* cpe:2.3:o:palo_alto_networks:pan-os:11.2.13:-:::::: cpe:2.3:o:palo_alto_networks:pan-os:11.2.13:h1:::::: cpe:2.3:o:palo_alto_networks:pan-os:11.2.1:::::::* cpe:2.3:o:palo_alto_networks:pan-os:11.2.2:::::::* cpe:2.3:o:palo_alto_networks:pan-os:11.2.3:::::::* cpe:2.3:o:palo_alto_networks:pan-os:11.2.4:::::::* cpe:2.3:o:palo_alto_networks:pan-os:11.2.5:::::::* cpe:2.3:o:palo_alto_networks:pan-os:11.2.6:::::::* cpe:2.3:o:palo_alto_networks:pan-os:11.2.7:::::::* cpe:2.3:o:palo_alto_networks:pan-os:11.2.8:::::::* cpe:2.3:o:palo_alto_networks:pan-os:11.2.9:::::::* cpe:2.3:o:palo_alto_networks:pan-os:12.1.2:::::::* cpe:2.3:o:palo_alto_networks:pan-os:12.1.3:::::::* cpe:2.3:o:palo_alto_networks:pan-os:12.1.4:::::::* cpe:2.3:o:palo_alto_networks:pan-os:12.1.5:::::::* cpe:2.3:o:palo_alto_networks:pan-os:12.1.6:::::::* cpe:2.3:o:palo_alto_networks:pan-os:12.1.7:::::::* cpe:2.3:o:palo_alto_networks:pan-os:12.1.8:::::::* cpe:2.3:o:palo_alto_networks:pan-os:12.1.9:::::::*
Vendors & Products		Palo Alto Networks Palo Alto Networks pan-os
References		https://security.paloaltonetworks.com/CVE-2026-0308
Metrics		cvssV4_0 `{'score': 0.4, 'vector': 'CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/AU:N/R:U/V:D/RE:M/U:Amber'}`