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CVE-2026-113374— Nexus Repository 3 - Privilege Escalation via Rut Auth Capability Creation

Quick assessment

Affected
Sonatype Nexus Repository 3
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Sonatype Nexus Repository 3 在用户创建 Rut Auth 能力时，未要求领域管理（realm administration）权限。仅拥有能力创建权限（nexus:capabilities:create）的用户即可创建该能力，从而为实例启用基于 HTTP 请求头的身份验证机制。随后，远程客户端无需提供凭据，即可冒充现有用户（包括管理员）进行身份验证。

CVSS 8.6 · High

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-113374

Vulnerability Information
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Vulnerability Title
Nexus Repository 3 - Privilege Escalation via Rut Auth Capability Creation
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Sonatype Nexus Repository 3 3.0.0 ~ 3.98.0 cpe:2.3:a:sonatype:nexus_repository_manager:3.0.0:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-113374

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-113374

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Other References for CVE-2026-113374 (2)

Same Patch Batch · Sonatype · 2026-11-04 · 7 CVEs total

CVE-2026-113373 9.1 CRITICAL Nexus Repository 3 - Disabled or Locked Single Sign-On Users Can Sign In Again
CVE-2026-113370 7.7 HIGH Nexus Repository 3 - SQL Injection in Reindex Search by Pattern Task
CVE-2026-113372 7.1 HIGH Nexus Repository 3 - Insufficiently Protected Credentials in YUM Repository Signing Key
CVE-2026-113371 7.1 HIGH Nexus Repository 3 - Insufficiently Protected Credentials in Repository Signing Passphrase
CVE-2026-113369 6.3 MEDIUM Nexus Repository 3 - Stored Cross-Site Scripting in OCI Attestations Tab
CVE-2026-113368 5.3 MEDIUM Nexus Repository 3 - Group Repository Member Authorization Bypass

IV. Related Vulnerabilities

Same product: Nexus Repository 3
Same vendor: Sonatype
Same weakness: CWE-862