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No special configuration is required to be affected by this issue.

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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."}],"value":"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. \n\nThis issue is applicable to PAN-OS software on PA-Series and VM-Series firewalls and on Panorama (virtual and M-Series).\n\nCloud NGFW and Prisma® Access are not affected by this vulnerability."}],"exploits":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"

Palo Alto Networks is not aware of any malicious exploitation of this issue.

"}],"value":"Palo Alto Networks is not aware of any malicious exploitation of this issue."}],"impacts":[{"capecId":"CAPEC-592","descriptions":[{"lang":"en","value":"CAPEC-592 Stored XSS"}]}],"metrics":[{"cvssV4_0":{"Automatable":"NO","Recovery":"USER","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":1.1,"baseSeverity":"LOW","exploitMaturity":"UNREPORTED","privilegesRequired":"HIGH","providerUrgency":"AMBER","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"PASSIVE","valueDensity":"DIFFUSE","vectorString":"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","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"LOW","vulnerabilityResponseEffort":"MODERATE"},"format":"CVSS","scenarios":[{"lang":"en","value":"The risk is highest when you allow access to the management interface from external IP addresses on the internet."}]},{"cvssV4_0":{"Automatable":"NO","Recovery":"USER","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"LOCAL","baseScore":0.4,"baseSeverity":"LOW","exploitMaturity":"UNREPORTED","privilegesRequired":"HIGH","providerUrgency":"AMBER","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"PASSIVE","valueDensity":"DIFFUSE","vectorString":"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","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"LOW","vulnerabilityResponseEffort":"MODERATE"},"format":"CVSS","scenarios":[{"lang":"en","value":"You can greatly reduce the risk of exploitation by restricting access to a jump box that is the only system allowed to access the management interface. This will ensure that attacks can succeed only if they obtain privileged access through those specified IP addresses."}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-79","description":"CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-06-10T20:30:04.127Z","orgId":"d6c1279f-00f6-4ef7-9217-f89ffe703ec0","shortName":"palo_alto"},"references":[{"tags":["vendor-advisory"],"url":"https://security.paloaltonetworks.com/CVE-2026-0266"}],"solutions":[{"lang":"eng","supportingMedia":[{"base64":false,"type":"text/html","value":"\n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n
Version
Minor Version
Suggested Solution
Cloud NGFW
No action needed.
PAN-OS 12.1
12.1.2 through 12.1.4Upgrade to 12.1.5 or later.
PAN-OS 11.2
11.2.0 through 11.2.10Upgrade to 11.2.11 or later.
PAN-OS 11.1
11.1.0 through 11.1.13Upgrade to 11.1.14 or later.
PAN-OS 10.2
10.2.0 through 10.2.18Upgrade to 11.1.14, 11.2.11, 12.1.5 or later.
All older
unsupported
PAN-OS versions		 Upgrade to a supported fixed version.
Prisma Access
No action needed.
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No known workarounds or mitigations exist for this issue.

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Scripting')"],"metrics":{"cvssMetricV40":[{"source":"psirt@paloaltonetworks.com","type":"Secondary","cvssData":{"version":"4.0","vectorString":"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","baseScore":1.1,"baseSeverity":"LOW","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"HIGH","userInteraction":"PASSIVE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"LOW","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","exploitMaturity":"UNREPORTED","confidentialityRequirement":"NOT_DEFINED","integrityRequirement":"NOT_DEFINED","availabilityRequirement":"NOT_DEFINED","modifiedAttackVector":"NOT_DEFINED","modifiedAttackComplexity":"NOT_DEFINED","modifiedAttackRequirements":"NOT_DEFINED","modifiedPrivilegesRequired":"NOT_DEFINED","modifiedUserInteraction":"NOT_DEFINED","modifiedVulnConfidentialityImpact":"NOT_DEFINED","modifiedVulnIntegrityImpact":"NOT_DEFINED","modifiedVulnAvailabilityImpact":"NOT_DEFINED","modifiedSubConfidentialityImpact":"NOT_DEFINED","modifiedSubIntegrityImpact":"NOT_DEFINED","modifiedSubAvailabilityImpact":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NO","Recovery":"USER","valueDensity":"DIFFUSE","vulnerabilityResponseEffort":"MODERATE","providerUrgency":"AMBER"}}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"266","Ordinal":"1","Title":"PAN-OS: Stored Cross-Site Scripting (XSS) Vulnerability in the W","CVE":"CVE-2026-0266","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"266","Ordinal":"1","NoteData":"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. \n\nThis issue is applicable to PAN-OS software on PA-Series and VM-Series firewalls and on Panorama (virtual and M-Series).\n\nCloud NGFW and Prisma® Access are not affected by this vulnerability.","Type":"Description","Title":"PAN-OS: Stored Cross-Site Scripting (XSS) Vulnerability in the W"}]}}}