nanoid Infinite Loop via Negative Size in non-secure module
nanoid (Nano ID) before 3.3.16 and 5.1.16 contains an infinite loop in the customAlphabet and nanoid functions of its non-secure module (nanoid/non-secure). When these functions are given a negative size, the loop counter is decremented from a negative value and never reaches its termination condition, spinning indefinitely and hanging the calling thread. An application that passes an unvalidated, attacker-controlled negative size to these functions is exposed to a denial-of-service condition.
CVE-2026-67214
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-2026-67214
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": "0",
"lessThan": "5.1.16",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.1.16",
"versionType": "semver"
},
{
"status": "affected",
"version": "0",
"lessThan": "3.3.16",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "3.3.16",
"versionType": "semver"
}
],
"packageURL": "pkg:npm/nanoid",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-67214
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #12801 · Revision 1
- Added to Heist Feed
- Publisher date