Answer in brief
CVE-2026-67214 records a High severity (CVSS 5.9) vulnerability in nanoid Infinite Loop via Negative Size in non-secure module. The current sources do not mark it as known exploited. The current feed maps nanoid_project/nanoid (generic), nanoid (npm), nanoid (npm), nanoid (npm) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 5.9. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps nanoid_project/nanoid (generic), nanoid (npm), nanoid (npm), nanoid (npm) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:a:nanoid_project:nanoid:*:*:*:*:*:node.js:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| nanoid_project/nanoidgeneric | >=0 <5.1.16 || >=0 <3.3.16 | 5.1.16, 3.3.16 |
| nanoidnpm | <3.3.16 | 3.3.16 |
| nanoidnpm | >=4.0.0,<5.1.16 | 5.1.16 |
| nanoidnpm | >=0 <3.3.16 | 3.3.16 |
| nanoidnpm | >=4.0.0 <5.1.16 | 5.1.16 |
Published upstream
Jul 29, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 7, 2026
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.
Quoted source text, attributed separately from HOL analysis.