Medium4.8Vendor: LowPalo Alto Networks

Medium [CVE-2026-0266] PAN-OS: Stored Cross-Site Scripting (XSS) Vulnerability in the Web Interface

This medium-severity Palo Alto Networks advisory covers CVE-2026-0266 affecting PAN-OS.

CVE-2026-0266 Published Jun 10, 2026

CVE-2026-0266

Affected products & platforms

Palo Alto NetworksPAN-OSFirewallPAN-OS / Panorama

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Summary

CVE-2026-0266 PAN-OS: Stored Cross-Site Scripting (XSS) Vulnerability in the Web Interface

Affected versions

PAN-OS < 12.1.5
PAN-OS < 11.2.11
PAN-OS < 11.1.14

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Fixed versions

PAN-OS >= 12.1.5
PAN-OS >= 11.2.11
PAN-OS >= 11.1.14

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Mitigation checklist

Recommended fix / mitigation

VersionMinor VersionSuggested SolutionCloud NGFWNo action needed.
PAN-OS 12.1 12.1.2 through 12.1.4 Upgrade to 12.1.5 or later.
PAN-OS 11.2 11.2.0 through 11.2.10 Upgrade to 11.2.11 or later.
PAN-OS 11.1 11.1.0 through 11.1.13 Upgrade to 11.1.14 or later.

Workaround status

No known workarounds or mitigations exist for this issue.

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Sources

Official and corroborating records used to build this advisory.

Palo Alto Networks Security Advisoriesofficial
Official vendor feed — the source of truth for this advisory. VulnPulse polled this feed and parsed this entry from it. Discovered from the machine-readable feed https://security.paloaltonetworks.com/rss.xml; this link opens the Palo Alto Networks advisory index instead of the raw feed document.
Palo Alto Networks
Vendor advisory pageofficial
Advisory page fetched and parsed to extract affected/fixed versions and mitigation guidance beyond what the feed carries.
Palo Alto Networks
CVE.org CNA affected-product recordCVE.org
Structured CNA affected[] data independently confirmed the affected product scope; native advisory content remains authoritative.
CVE Program

Cross-references

Validate CVE metadata against the authoritative registries.

CVE-2026-0266NVD CVE.org MITRE

Official resources

PAN-OS / Panorama upgrade guide (target: 12.1.5 / 11.2.11 / 11.1.14)
Official documentation
This advisory names 12.1.5 / 11.2.11 / 11.1.14 as the first fixed releases — official upgrade documentation for PAN-OS firewalls and Panorama.
Palo Alto Networks Security Advisories portal
Official documentation
Canonical advisory portal — check here for the latest revision of this advisory and affected-version updates.

Discussion(0)

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