Vulnerability · Published Aug 17, 2026 · Assigned by GitHub_M
CVE-2026-71479New API: Integer overflow in quota billing yields negative charges (self-crediting)
Critical 9.1
In plain English
A critical-severity integer overflow 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 51% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
New API is a large language mode (LLM) gateway and artificial intelligence (AI) asset management system. Prior to 1.0.0-rc.18, user-controlled image n, video seconds and duration, max_tokens, max_completion_tokens, maxOutputTokens, audio duration, and billing-expression quantities can overflow conversions in common/quota_math.go and related settlement paths, allowing a low-privileged account with positive balance or an active subscription to turn a negative charge into account credit and potentially drain upstream funds. This issue is fixed in version 1.0.0-rc.18.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/QuantumNous/new-api | 1.0.0-rc.18 | GHSA-8r8v-xf7q-rcpr |
| Go | github.com/QuantumNous/new-api | 1.0.0-rc.18 | GO-2026-6242 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| QuantumNous | new-api | < 1.0.0-rc.18 |
Weakness: CWE-190, CWE-682 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
References
- https://github.com/QuantumNous/new-api/security/advisories/GHSA-8r8v-xf7q-rcpr x_refsource_CONFIRM
- https://github.com/QuantumNous/new-api/commit/c9943d37ad93477dd937fc4901cc3c4e0fd8aaab x_refsource_MISC
- https://github.com/QuantumNous/new-api/commit/d0bd8aac742d1e160a5ca61743fe35f4fff880e8 x_refsource_MISC
- https://github.com/QuantumNous/new-api/releases/tag/v1.0.0-rc.18 x_refsource_MISC