Infinite loop in nanoid - CVE-2026-67214

Vulnerability details

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to infinite loop in the customAlphabet and nanoid functions of its non-secure module (nanoid/non-secure). A remote attacker can consume all available system resources and cause denial of service conditions.

Affected software

How to mitigate CVE-2026-67214

External References

• https://github.com/ai/nanoid/commit/6ccc67bbaba71d3d77a21d9b636f4171a268ce49
• https://github.com/ai/nanoid/releases/tag/3.3.16
• https://github.com/ai/nanoid/releases/tag/5.1.16
• https://www.vulncheck.com/advisories/nanoid-before-infinite-loop-via-negative-size-in-non-secure-module

Related Security Bulletins

• Infinite loop in nanoid (Nano ID)
• Multiple vulnerabilities in IBM Netezza Appliance - Cyclops