CVE-2026-83801
Received Received - Intake

Stored XSS in Nautobot Relationship and Module Family Fields

Publication date: 2026-09-22

Last updated on: 2026-09-22

Assigner: GitHub, Inc.

Description
Nautobot is a Network Source of Truth and Network Automation Platform. Prior to 2.4.37 and 3.1.8, a user with extras.add_relationship or extras.change_relationship permission can store HTML or JavaScript in a Relationship description, and a user with dcim.add_modulefamily or dcim.change_modulefamily permission can store it in a Module Family name. Nautobot assigns these values to form field help_text rendered by render_field.html through Django's |safe filter without adequate neutralization. The stored content executes in the authenticated browser session of any user, including an administrator or superuser, who opens an affected create or edit form. This can enable actions as the victim, session or token theft, and further privilege escalation. This issue is fixed in versions 2.4.37 and 3.1.8.

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Meta Information

Published
2026-09-22
Last Modified
2026-09-22
Generated
2026-09-23
AI Q&A
2026-09-22
EPSS Evaluated
N/A
NVD
CVE-2026-83801
EUVD
EUVD-2026-84814

Affected Vendors & Products

Showing 4 associated CPEs
Vendor Product Version / Range
nautobot nautobot to 2.4.37 (exc)
nautobot nautobot to 3.1.8 (exc)
nautobot nautobot From 2.4.37 (exc) to 3.1.7 (inc)
nautobot nautobot to 2.4.37|end_excluding=3.1.8 (exc)

Helpful Resources

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.

Attack-Flow Graph

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Executive Summary

This is a stored cross-site scripting (XSS) vulnerability in Nautobot versions before 2.4.37 and 3.1.8. Attackers with specific permissions can inject malicious scripts into Relationship descriptions or Module Family names. When other users view these fields in forms, the scripts execute in their browser sessions, potentially leading to session hijacking, unauthorized actions, or privilege escalation.

Detection Guidance

To detect this vulnerability, audit Relationship descriptions and Module Family names for malicious HTML/JavaScript content. Check for entries containing script tags or event handlers in these fields. Use Nautobot's API or UI to review all Relationship descriptions and Module Family names for suspicious content. No specific commands are provided in the resources, but manual inspection of these fields is required.

Impact Analysis

If exploited, this vulnerability could allow attackers to perform actions on your behalf, steal session tokens or cookies, escalate privileges, or gain unauthorized access to sensitive data. Victims must open an affected form for the attack to succeed, but no further user interaction is required once the form is loaded.

Compliance Impact

This vulnerability could lead to unauthorized access to personal or sensitive data, violating GDPR and HIPAA requirements for data protection and access controls. Organizations using affected Nautobot versions may face compliance violations if exploited.

Mitigation Strategies

Immediately upgrade Nautobot to version 2.4.37 or 3.1.8 or later. Temporarily restrict extras.add_relationship, extras.change_relationship, dcim.add_modulefamily, and dcim.change_modulefamily permissions to trusted administrators only. Audit existing Relationship descriptions and Module Family names for malicious content and remove any suspicious entries.

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