CVE-2026-113374
Received Received - Intake

Nexus Repository Header-Based Authentication Bypass

Publication date: 2026-11-04

Last updated on: 2026-11-04

Assigner: Sonatype

Description
Sonatype Nexus Repository 3 does not require realm administration permission when a user creates a Rut Auth capability. A user who holds only the capability creation permission (nexus:capabilities:create) can create this capability, which turns on header-based authentication for the instance. A remote client can then authenticate as an existing user, including an administrator, without credentials.

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Meta Information

Published
2026-11-04
Last Modified
2026-11-04
Generated
2026-11-04
AI Q&A
2026-11-04
EPSS Evaluated
N/A
NVD
CVE-2026-113374
EUVD
EUVD-2026-117057

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
Sonatype Nexus Repository 3 3.0.0

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-862 The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

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Executive Summary

Sonatype Nexus Repository 3 has a privilege escalation vulnerability where a user with only capability creation permission can enable header-based authentication without needing realm administration rights. This allows remote clients to authenticate as any existing user, including administrators, without providing credentials.

Detection Guidance

Check Nexus Repository 3 configurations for unauthorized Rut Auth capabilities by reviewing the list of enabled capabilities in the admin interface. Look for any Rut Auth capability that was created by users without administrative privileges. Use the Nexus Repository API to list capabilities and verify permissions.

Impact Analysis

An attacker could gain unauthorized access to the Nexus Repository instance by impersonating legitimate users, including administrators. This could lead to data breaches, unauthorized modifications, or complete system compromise if sensitive repositories are accessed.

Compliance Impact

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

Mitigation Strategies

Upgrade to Nexus Repository 3.98.0 or later. Restrict capability creation privileges to trusted administrators only. Review and remove any unauthorized Rut Auth capabilities or realms. If Rut Auth is unused, disable and remove the capability entirely.

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