CVE-2026-0266Network attack vector

Administrator-context script execution via stored payload

Published Jun 10, 2026 · Updated Jun 10, 2026

Stored XSS in Palo Alto Networks PAN-OS allows remote authenticated users to execute JavaScript in an administrator's browser. The web interface accepts and persists a JavaScript payload, but Palo Alto Networks has not disclosed the affected page, input field, or missing neutralization step. Administrator privileges are required to plant the payload, and an interface user must later render it; no data disclosure or service interruption is reported.

CVSS severity4.8
Medium
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Palo Alto Networks PAN-OS allows remote authenticated users to execute JavaScript in an administrator's browser. The web interface accepts and persists a JavaScript payload, but Palo Alto Networks has not disclosed the affected page, input field, or missing neutralization step. Administrator privileges are required to plant the payload, and an interface user must later render it; no data disclosure or service interruption is reported.

The record

CVE
CVE-2026-0266
Published
Jun 10, 2026
Updated
Jun 10, 2026
Vendor
Palo Alto Networks
Product
PAN-OS
Classifications
CWE-79, CAPEC-592, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jun 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=10.2.0
  2. Affected versionversion=11.1.0 <11.1.14 changes=[{"at":"11.1.14","status":"unaffected"}]
  3. Affected versionversion=11.2.0 <11.2.11 changes=[{"at":"11.2.11","status":"unaffected"}]
  4. Affected versionversion=12.1.0 <12.1.5 changes=[{"at":"12.1.5","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Palo Alto Networks · PAN-OSversion=10.2.0; version=11.1.0 <11.1.14 changes=[{"at":"11.1.14","status":"unaffected"}]; version=11.2.0 <11.2.11 changes=[{"at":"11.2.11","status":"unaffected"}]; version=12.1.0 <12.1.5 changes=[{"at":"12.1.5","status":"unaffected"}]

Published CVSS scores

4.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
1.1Palo Alto NetworksCVSS: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

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC-592Stored XSS
T1059.007JavaScript/JScript

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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