Vulnerability in Nanoid Project
CVE-2026-67214
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.
EPSS: 0.003 (25.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Nanoid_project Nanoid — versions 0, 5.1.16
Weakness classification (CWE)
References
- disclosure@vulncheck.com (release-notes, Product, Release Notes)
- disclosure@vulncheck.com (Patch, patch)
- disclosure@vulncheck.com (Patch, Third Party Advisory, Release Notes, third-party-advisory)
- disclosure@vulncheck.com (release-notes, Product, Release Notes)
Frequently asked questions
- What is CVE-2026-67214?
- CVE-2026-67214 is a medium-severity vulnerability in Nanoid Project, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 5.9/10. Published 2026-07-29.
- How severe is CVE-2026-67214?
- Medium severity. CVSS v3 base score is 5.9 out of 10.