---
title: "CVE-2026-71479: New API: Integer overflow in quota billing yields negative charges (self-crediting)"
url: https://erroneo.us/security/cve/CVE-2026-71479/
description: "CVE-2026-71479 (github.com/QuantumNous/new-api (Go)): New API is a large language mode (LLM) gateway and artificial intelligence (AI) asset management…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-08-17
date_modified: 2026-08-17
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-71479"
kev: false
cvss: 9.1
epss: 0.00647
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-71479: New API: Integer overflow in quota billing yields negative charges (self-crediting)

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 0.6% , percentile 50: FIRST’s model estimates a 0.6% chance of exploitation activity in the next 30 days, higher than 50% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes github.com/QuantumNous/new-api (Go) <= 1.0.0-rc.17, fixed in 1.0.0-rc.18 . Check your lockfile, including transitive dependencies.

## What it is

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, maxtokens, maxcompletiontokens, maxOutputTokens, audio duration, and billing-expression quantities can overflow conversions in common/quotamath.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

- Go `github.com/QuantumNous/new-api` <= 1.0.0-rc.17 → fixed: 1.0.0-rc.18

## Affected products (CVE record)

- QuantumNous new-api: < 1.0.0-rc.18

## Severity

- GitHub_M CVSS 3.1: 9.1 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H`
- GitHub CVSS 3.1: 9.1 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation none , automatable yes , technical impact partial .
- FIRST EPSS (model of 2026-10-21): 0.65% probability of exploitation activity in the next 30 days; percentile 50.

## Sources

- [GitHub Advisory GHSA-8r8v-xf7q-rcpr](https://github.com/advisories/GHSA-8r8v-xf7q-rcpr)
- [CVE.org record CVE-2026-71479](https://www.cve.org/CVERecord?id=CVE-2026-71479)
- [NVD entry CVE-2026-71479](https://nvd.nist.gov/vuln/detail/CVE-2026-71479)
- [github.com](https://github.com/QuantumNous/new-api/security/advisories/GHSA-8r8v-xf7q-rcpr)
- [github.com](https://github.com/QuantumNous/new-api/commit/c9943d37ad93477dd937fc4901cc3c4e0fd8aaab)
- [github.com](https://github.com/QuantumNous/new-api/commit/d0bd8aac742d1e160a5ca61743fe35f4fff880e8)
- [github.com](https://github.com/QuantumNous/new-api/releases/tag/v1.0.0-rc.18)

---
Source page: https://erroneo.us/security/cve/CVE-2026-71479/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt