CVE-2026-67213
nanoid before 5.1.6 Infinite Loop via Zero Size in customAlphabet and customRandom
CVSS Score
5.9
EPSS Score
0.0%
EPSS Percentile
0th
nanoid (Nano ID) before 5.1.6 contains an infinite loop in the customAlphabet and customRandom functions. When these functions are configured with a size of 0, the internal generation loop never satisfies its exit condition and spins indefinitely, hanging the calling thread. An application that passes an unvalidated, attacker-controlled size of 0 to these functions is exposed to a denial-of-service condition.
| CWE | CWE-835 |
| Vendor | nanoid_project |
| Product | nanoid |
| Published | Jul 29, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
nanoid_project / nanoid
0 < 5.1.6