nanoid before 5.1.6 Infinite Loop via Zero Size in customAlphabet and customRandom
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.
CVE-2026-67213
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-67213
nanoid
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "nanoid_project",
"product": "nanoid",
"versions": [
{
"status": "affected",
"version": "3.0.0",
"lessThan": "3.3.17",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.0.0",
"lessThan": "5.1.6",
"versionType": "semver"
}
],
"packageURL": "pkg:npm/nanoid",
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-67213
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #12800 · Revision 1
- Added to Heist Feed
- Publisher date