# Arbitrary File Write in npm

Advisory record · `GHSA-m6cx-g6qm-p2cx`

- **Identifiers:** `GHSA-m6cx-g6qm-p2cx` · `CVE-2019-16775`
- **State:** Confirmed
- **Severity:** CVSS 7.7 High
- **Critical:** No
- **Weakness (CWE):** [CWE-59](https://cwe.mitre.org/data/definitions/59.html) · [CWE-61](https://cwe.mitre.org/data/definitions/61.html)
- **Tags:** [Path traversal](https://agentprime.io/advisories/tag/path-traversal.md) · [CWE-61](https://agentprime.io/advisories/tag/cwe-61.md)
- **Published:** 13 Dec 2019
- **Updated:** 10 Sept 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 13 Dec 2019, 15:39 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `npm` (npm): affected `<6.13.3`; fixed in `6.13.3`

## 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

- 7.7 High, CVSS 3.1: `CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N`, from CNA (GitHub_M)

- **CISA KEV:** Not listed.
- **EPSS:** 0.029, the 87th percentile, on 8 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the GitHub Advisory Database, published 13 Dec 2019. New records show when each source confirmed them.

## Sources

- [GitHub Advisory Database: GHSA-m6cx-g6qm-p2cx](https://github.com/advisories/GHSA-m6cx-g6qm-p2cx)
- [OSV: GHSA-m6cx-g6qm-p2cx](https://osv.dev/vulnerability/GHSA-m6cx-g6qm-p2cx)
- <https://github.com/npm/cli/security/advisories/GHSA-m6cx-g6qm-p2cx>
- <https://nvd.nist.gov/vuln/detail/CVE-2019-16775>
- <https://access.redhat.com/errata/RHEA-2020:0330>
- <https://access.redhat.com/errata/RHSA-2020:0573>
- <https://access.redhat.com/errata/RHSA-2020:0579>
- <https://access.redhat.com/errata/RHSA-2020:0597>
- <https://access.redhat.com/errata/RHSA-2020:0602>
- <https://blog.npmjs.org/post/189618601100/binary-planting-with-the-npm-cli>
- <https://github.com/advisories/GHSA-m6cx-g6qm-p2cx>
- <https://github.com/npm/cli>
- <https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/Z36UKPO5F3PQ3Q2POMF5LEKXWAH5RUFP>
- <https://www.npmjs.com/advisories/1434>

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-m6cx-g6qm-p2cx>, 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-m6cx-g6qm-p2cx/>. Everything for agents: <https://agentprime.io/llms.txt>.