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

> Attackers can exploit integer overflows in billing calculations to generate negative charges, resulting in unauthorized account credits and potential financial loss.

- **Severity:** Critical 9.1 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 17 Aug 2026
- **Updated:** 17 Aug 2026
- **Also known as:** GHSA-8r8v-xf7q-rcpr, GO-2026-6242

## What is CVE-2026-71479?

CVE-2026-71479 is a critical vulnerability in QuantumNous new-api, published on 17 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### 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.

Weakness: CWE-682 (Incorrect Calculation), CWE-190 (Integer Overflow or Wraparound)

## Which versions are affected by CVE-2026-71479?

3 open source packages ship an affected version, including github.com/QuantumNous/new-api.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `github.com/QuantumNous/new-api` | Go | All versions | 1.0.0-rc.18 |
| `github.com/QuantumNous/new-api` | Go | All versions | 1.0.0-rc.18 |
| `github.com/QuantumNous/new-api` | Go | All versions | 1.0.0-rc.18 |

## How do I fix CVE-2026-71479?

Upgrade github.com/QuantumNous/new-api to 1.0.0-rc.18 or later.

## Is CVE-2026-71479 being exploited?

There is no known exploitation of CVE-2026-71479 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-71479 and fix it if it is affected.

What it is: CVE-2026-71479 is a critical vulnerability in QuantumNous new-api, published on 17 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-71479 in the wild and no public exploit code.

Affected packages and fixed versions:
- github.com/QuantumNous/new-api (Go): affected all versions; fixed in 1.0.0-rc.18
- github.com/QuantumNous/new-api (Go): affected all versions; fixed in 1.0.0-rc.18
- github.com/QuantumNous/new-api (Go): affected all versions; fixed in 1.0.0-rc.18

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-71479/ (Markdown: https://insights.sbomify.com/CVE-2026-71479/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-71479
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-71479
- OSV: https://osv.dev/vulnerability/CVE-2026-71479

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-71479/
Summaries are generated and may contain mistakes; the official description above is the record.