CVE-2024-55565
MEDIUMCVE-2024-55565 is a medium-severity (CVSS 4.3) CWE-835 vulnerability in nanoid. O3 Security confirms whether CVE-2024-55565 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
Predictable results in nanoid generation when given non-integer values
Blast Radius
Weekly download volume for affected packages — a proxy for how broadly this vulnerability is deployed.
nanoidnpmDescription
nanoid (aka Nano ID) before 5.0.9 mishandles non-integer values. 3.3.8 is also a fixed version.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 📦npm | nanoid | ≥ 4.0.0&&< 5.0.9 | 5.0.9 |
| 📦npm | nanoid | all versions | 3.3.8 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for nanoid. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update nanoid to 5.0.9 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2024-55565 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether CVE-2024-55565 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to CVE-2024-55565. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is CVE-2024-55565 in your dependencies?
O3 detects CVE-2024-55565 across npm dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.