CVE-2026-78902
Received Received - Intake

Cross Site Scripting in Netgate pfSense pfBlockerNG

Publication date: 2026-09-25

Last updated on: 2026-09-25

Assigner: MITRE

Description
Cross Site Scripting vulnerability in Netgate pfSense 26.03.1-RELEASE allows an attacker to execute arbitrary code via the pfBlockerNG package

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Meta Information

Published
2026-09-25
Last Modified
2026-09-25
Generated
2026-09-25
AI Q&A
2026-09-25
EPSS Evaluated
N/A
NVD
CVE-2026-78902
EUVD
EUVD-2026-87083

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
netgate pfsense 26.03.1-RELEASE

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

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Executive Summary

This is a Cross Site Scripting (XSS) vulnerability in Netgate pfSense version 26.03.1-RELEASE. It allows an attacker to inject malicious scripts into web pages viewed by users through the pfBlockerNG package. The attacker can then execute arbitrary code in the context of the affected user's browser session.

Impact Analysis

An attacker could steal sensitive information like session cookies, credentials, or other personal data from users accessing the pfSense web interface. They might also perform actions on behalf of the user or redirect users to malicious websites.

Compliance Impact

This vulnerability could lead to unauthorized access to personal or sensitive data, violating GDPR and HIPAA requirements for data protection and confidentiality. Organizations may face compliance violations, legal penalties, and reputational damage if exploited.

Mitigation Strategies

Update pfSense to the latest version and remove or disable the pfBlockerNG package if not needed. Apply input validation for user-supplied data in web interfaces.

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