{"id":"CVE-2026-67214","aliases":["GHSA-28wg-ghj8-5hjv"],"url":"https://o3.security/vulnerability/CVE-2026-67214","summary":"nanoid Infinite Loop via Negative Size in non-secure module","details":"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.","published":"2026-07-29T13:32:02.265Z","modified":"2026-08-28T11:47:20.486768774Z","cvss":null,"epss":{"score":0.0033,"percentile":0.25688,"asOf":"2026-09-06"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"nanoid","fixedVersion":"3.3.16"},{"ecosystem":"npm","name":"nanoid","fixedVersion":"5.1.16"}],"fix":{"url":"https://github.com/ai/nanoid/commit/6ccc67bbaba71d3d77a21d9b636f4171a268ce49","label":"ai/nanoid@6ccc67b"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67214.json"},{"type":"ADVISORY","url":"https://github.com/ai/nanoid/releases/tag/3.3.16"},{"type":"ADVISORY","url":"https://github.com/ai/nanoid/releases/tag/5.1.16"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-67214"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/nanoid-before-infinite-loop-via-negative-size-in-non-secure-module"},{"type":"FIX","url":"https://github.com/ai/nanoid/commit/6ccc67bbaba71d3d77a21d9b636f4171a268ce49"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-28T11:47:20.486768774Z"}}