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CVE-2026-64859— New API: User List API Leaks Root User Access Token Leading to Privilege Escalation

CVSS 9.1 · Critical

Possible ATT&CK Techniques 1AI

T1530 · Data from Cloud Storage

Affected Version Matrix 1

VendorProductVersion RangeStatus
QuantumNousnew-api< 1.0.0-rc.7affected
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I. Basic Information for CVE-2026-64859

Vulnerability Information
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Vulnerability Title
New API: User List API Leaks Root User Access Token Leading to Privilege Escalation
Source: CVE Program / CVE List V5
Vulnerability Description
New API is a large language mode (LLM) gateway and artificial intelligence (AI) asset management system. Prior to 1.0.0-rc.7, the admin user list and user lookup APIs, including GET /api/user/, return User.AccessToken as access_token because User model objects are serialized after queries use Omit("password"), allowing an authenticated administrator to obtain the root user's bearer token and access root-only system configuration APIs. This issue is fixed in version 1.0.0-rc.7.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5

Affected Products

VendorProductAffected VersionsCPESubscribe
QuantumNousnew-api < 1.0.0-rc.7 -

II. Public POCs for CVE-2026-64859

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium
Qwen3.6-35B-A3B · 7877 chars
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III. Intelligence Information for CVE-2026-64859

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Patches & Fixes for CVE-2026-64859 (1)

Vendor Advisories for CVE-2026-64859 (1)

Vendor Pages for CVE-2026-64859 (1)

Same Patch Batch · QuantumNous · 2026-08-17 · 5 CVEs total

CVE-2026-714799.1 CRITICALNew API: Integer overflow in quota billing yields negative charges (self-crediting)
CVE-2026-648687.5 HIGHNew API: Unauthenticated payment webhooks allow memory and disk DoS via unbounded body rea
CVE-2026-648656.0 MEDIUMNew API: Redis user quota cache overwrite via PUT /api/user/self allows quota bypass
CVE-2026-648665.1 MEDIUMNew API: Admin can reset passkeys for same-level or higher-privileged users

IV. Related Vulnerabilities

Same product: new-api
Same vendor: QuantumNous
Same weakness: CWE-200

V. Comments for CVE-2026-64859

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