# json-2-csv vulnerable to CSV Injection via the preventCsvInjection optio

Advisory record · `GHSA-g27c-q7cp-mhx6`

- **Identifiers:** `GHSA-g27c-q7cp-mhx6` · `CVE-2026-9673`
- **State:** Confirmed
- **Severity:** CVSS 7.0 High
- **Critical:** No
- **Weakness (CWE):** [CWE-1236](https://cwe.mitre.org/data/definitions/1236.html)
- **Tags:** [Other injection](https://agentprime.io/advisories/tag/injection.md)
- **Published:** 28 May 2026
- **Updated:** 10 Sept 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 28 May 2026, 06:31 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `json-2-csv` (npm): affected `>=3.15.0, <5.5.11`; fixed in `5.5.11`

## 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

- 7.0 High, CVSS 4.0: `CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:P`, from CNA (snyk)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0017, the 5th percentile, on 14 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 28 May 2026. New records show when each source confirmed them.

## Sources

- [GitHub Advisory Database: GHSA-g27c-q7cp-mhx6](https://github.com/advisories/GHSA-g27c-q7cp-mhx6)
- [OSV: GHSA-g27c-q7cp-mhx6](https://osv.dev/vulnerability/GHSA-g27c-q7cp-mhx6)
- <https://nvd.nist.gov/vuln/detail/CVE-2026-9673>
- <https://github.com/mrodrig/json-2-csv/commit/0fdd0bb6d0273178cd940afc323ccbce19688229>
- <https://gist.github.com/whoamins/299745a2d36b482b44e9613b78e40613>
- <https://github.com/mrodrig/json-2-csv>
- <https://github.com/mrodrig/json-2-csv/blob/main/src/json2csv.ts%23L410>
- <https://security.snyk.io/vuln/SNYK-JS-JSON2CSV-14221326>

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-g27c-q7cp-mhx6>, 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-g27c-q7cp-mhx6/>. Everything for agents: <https://agentprime.io/llms.txt>.