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

Advisory record · `GHSA-8r8v-xf7q-rcpr`

- **Identifiers:** `GHSA-8r8v-xf7q-rcpr` · `CVE-2026-71479` · `GO-2026-6242`
- **State:** Confirmed
- **Severity:** CVSS 9.1 Critical
- **Critical:** Yes: CVSS 9+
- **Weakness (CWE):** [CWE-190](https://cwe.mitre.org/data/definitions/190.html) · [CWE-682](https://cwe.mitre.org/data/definitions/682.html)
- **Tags:** [Memory corruption](https://agentprime.io/advisories/tag/memory-corruption.md) · [CWE-682](https://agentprime.io/advisories/tag/cwe-682.md)
- **Published:** 17 Aug 2026
- **Updated:** 18 Aug 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 17 Aug 2026, 16:36 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Critical

Critical, because:

- CVSS score 9.1: 9.0 or more.

How we decide what’s critical: <https://agentprime.io/advisories/critical.md>

## Affected packages

- `github.com/QuantumNous/new-api` (Go): affected `<1.0.0-rc.18`; fixed in `1.0.0-rc.18`

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 9.1 Critical, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H`, from CNA (GitHub_M)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0065, the 51st percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 14:50 UTC: First seen by agentprime
- 31 Oct 2026, 14:50 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-8r8v-xf7q-rcpr)

## Sources

- [GitHub Advisory Database: GHSA-8r8v-xf7q-rcpr](https://github.com/advisories/GHSA-8r8v-xf7q-rcpr)
- [OSV: GHSA-8r8v-xf7q-rcpr](https://osv.dev/vulnerability/GHSA-8r8v-xf7q-rcpr)
- <https://github.com/QuantumNous/new-api/security/advisories/GHSA-8r8v-xf7q-rcpr>
- <https://github.com/QuantumNous/new-api/commit/c9943d37ad93477dd937fc4901cc3c4e0fd8aaab>
- <https://github.com/QuantumNous/new-api/commit/d0bd8aac742d1e160a5ca61743fe35f4fff880e8>
- <https://github.com/QuantumNous/new-api>
- <https://github.com/QuantumNous/new-api/releases/tag/v1.0.0-rc.18>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-8r8v-xf7q-rcpr>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-8r8v-xf7q-rcpr/>. Everything for agents: <https://agentprime.io/llms.txt>.