PAN-OS: Stored Cross-Site Scripting (XSS) Vulnerability in the Web Interface (CVE-2026-0308) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-0308

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

Answer in brief

CVE-2026-0308 records a Unknown severity vulnerability in PAN-OS: Stored Cross-Site Scripting (XSS) Vulnerability in the Web Interface. The current sources do not mark it as known exploited. The current feed maps Palo Alto Networks/PAN-OS (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 10, 2026Updated Sep 10, 2026Source checked Sep 10, 2026First seen by HOL Sep 10, 2026Material review Sep 10, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Palo Alto Networks/PAN-OS (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Palo Alto Networks/PAN-OSgeneric	>=12.1.0 <12.1.10 \|\| >=11.2.0 <11.2.13-h2 \|\| >=11.1.0 <11.1.16-h2	12.1.10, 11.2.13-h2, 11.1.16-h2

Recommended response

Check inventory. Check lockfiles and deployed manifests for Palo Alto Networks/PAN-OS.
Review the reported fix. Update Palo Alto Networks/PAN-OS to 12.1.10 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 10, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 10, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 10, 2026

Sources and claim methodology

Source referencesecurity.paloaltonetworks.com

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.