Medium
Predictable results in nanoid generation when given non-integer values
When nanoid is called with a fractional value, there were a number of undesirable effects:
- in browser and non-secure, the code infinite loops on while (size--)
- in node, the value of poolOffset becomes fractional, causing calls to nanoid to return zeroes until the pool is next filled
- if the first call in node is a fractional argument, the initial buffer allocation fails with an error
Version 3.3.8 and 5.0.9 are fixed.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | nanoid | >= 4.0.0, < 5.0.9, < 3.3.8 | 5.0.9, 3.3.8 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2024-55565
- https://github.com/ai/nanoid/pull/510
- https://github.com/ai/nanoid
- https://github.com/ai/nanoid/compare/3.3.7...3.3.8
- https://github.com/ai/nanoid/releases/tag/5.0.9
- https://lists.debian.org/debian-lts-announce/2024/12/msg00025.html
- https://lists.debian.org/debian-lts-announce/2025/01/msg00006.html
CVSS score
4.3/10
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N- Weakness (CWE)
CWE-835- Platform
- npm
- Package
nanoid- Disclosed
- 09.12.2024
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-mwcw-c2x4-8c55 - CC BY 4.0
Vulnerability history: nanoid
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 5
- First → latest
- 01.2022 09.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 3
- Medium 2
Disclosures per year
- 2022: 1
- 2023: 0
- 2024: 1
- 2025: 0
- 2026: 3
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Predictable results in nanoid generation when given non-integer values this entry
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