Bug 2567883 (CVE-2026-113374)

Summary: CVE-2026-113374 nexus: nexus: Authentication bypass via Rut Auth capability creation
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: high    
Version: unspecifiedKeywords: Security
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OS: Linux   
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A flaw was found in nexus. This vulnerability allows privilege escalation when an authenticated user with capability creation permissions enables the Rut Auth capability without requiring realm administration authorization. This action turns on header-based authentication for the instance, enabling a remote attacker to bypass authentication and log in as any existing user, including an administrator, without providing credentials.
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Description OSIDB Bzimport 2026-11-05 22:33:38 UTC 
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.