{"id":"GHSA-28wg-ghj8-5hjv","revision":"08441b5df46d46d18c8c13e66eb1d133","records":[{"revision":"08441b5df46d46d18c8c13e66eb1d133","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-28wg-ghj8-5hjv","aliases":["CVE-2026-67214"],"title":"nanoid: non-secure generators can loop indefinitely with negative size","description":"nanoid (Nano ID) before 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.","state":0,"publishedAt":"2026-07-29T15:31:12+00:00","modifiedAt":"2026-09-10T03:50:51.1912569+00:00","affected":[{"ecosystem":"npm","name":"nanoid","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"3.3.16"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"npm","name":"nanoid","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"4.0.0"},{"kind":"fixed","version":"5.1.16"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","score":null,"severity":null},{"system":"CVSS_V4","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","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"HIGH"}],"references":["https://nvd.nist.gov/vuln/detail/CVE-2026-67214","https://github.com/ai/nanoid/pull/600","https://github.com/ai/nanoid/pull/601","https://github.com/ai/nanoid/commit/6ccc67bbaba71d3d77a21d9b636f4171a268ce49","https://github.com/ai/nanoid/commit/e835c9b71eab832bc6106944bdd26ea96cf2c66d","https://github.com/ai/nanoid","https://github.com/ai/nanoid/releases/tag/5.1.16","https://www.vulncheck.com/advisories/nanoid-before-infinite-loop-via-negative-size-in-non-secure-module"],"sourceUrl":"https://github.com/advisories/GHSA-28wg-ghj8-5hjv","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-28wg-ghj8-5hjv","identifiers":["GHSA-28wg-ghj8-5hjv","CVE-2026-67214"]},"retained":false,"historicalAffected":[]}],"coverage":[]}