{"id":"CVE-2026-67214","state":"PUBLISHED","title":"nanoid Infinite Loop via Negative Size in non-secure module","description":"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.","publishedAt":"2026-07-29T13:32:02.265Z","updatedAt":"2026-10-29T21:16:30.083Z","severity":{"score":8.2,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","source":"VulnCheck"},"assigner":"VulnCheck","products":["nanoid_project nanoid"],"affected":[{"vendor":"nanoid_project","product":"nanoid","packageURL":"pkg:npm/nanoid","defaultStatus":"unaffected","versions":[{"version":"4.0.0","status":"affected","lessThan":"5.1.16","versionType":"semver"},{"version":"5.1.16","status":"unaffected","versionType":"semver"},{"version":"0","status":"affected","lessThan":"3.3.16","versionType":"semver"},{"version":"3.3.16","status":"unaffected","versionType":"semver"}]}],"references":["https://github.com/ai/nanoid/releases/tag/5.1.16","https://github.com/ai/nanoid/releases/tag/3.3.16","https://github.com/ai/nanoid/commit/6ccc67bbaba71d3d77a21d9b636f4171a268ce49","https://www.vulncheck.com/advisories/nanoid-before-infinite-loop-via-negative-size-in-non-secure-module"],"weaknesses":["CWE-835"],"ingestedAt":"2026-10-29T23:12:04.845Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/67xxx/CVE-2026-67214.json","commit":"dc7676b3f67d6707e4927968546e7e0125ff7ec7","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-67214","state":"PUBLISHED","datePublished":"2026-07-29T13:32:02.265Z","dateUpdated":"2026-10-29T21:16:30.083Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-07-28T18:13:39.684Z"},"containers":{"cna":{"title":"nanoid Infinite Loop via Negative Size in non-secure module","descriptions":[{"lang":"en","value":"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). 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