Vulnerability · Published Aug 17, 2026 · Assigned by GitHub_M

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

Critical 9.1

In plain English

A critical-severity information exposure in new-api from QuantumNous. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 50% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.1Critical

Exploit odds (30 days)0.6%top 49.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	github.com/QuantumNous/new-api	1.0.0-rc.7	GHSA-6x2c-phff-wx57
Go	github.com/QuantumNous/new-api	1.0.0-rc.7	GO-2026-6240

Affected products (as reported)

Vendor	Product	Versions
QuantumNous	new-api	< 1.0.0-rc.7

Weakness: CWE-200 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

References

https://github.com/QuantumNous/new-api/security/advisories/GHSA-6x2c-phff-wx57 x_refsource_CONFIRM
https://github.com/QuantumNous/new-api/pull/4929 x_refsource_MISC
https://github.com/QuantumNous/new-api/commit/0936e2504655a5cbf7bc3c388f6d3e2bb24916d3 x_refsource_MISC
https://github.com/QuantumNous/new-api/releases/tag/v1.0.0-rc.7 x_refsource_MISC