{"id":"GHSA-2v37-7h3g-55p8","revision":"1b896ffdd29a49688536353f17ceeba8","records":[{"revision":"1b896ffdd29a49688536353f17ceeba8","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-2v37-7h3g-55p8","aliases":["CVE-2026-67213"],"title":"nanoid: custom generators can loop indefinitely when size is zero","description":"nanoid (Nano ID) before 5.1.6 contains an infinite loop in the customAlphabet and customRandom functions. When these functions are configured with a size of 0, the internal generation loop never satisfies its exit condition and spins indefinitely, hanging the calling thread. An application that passes an unvalidated, attacker-controlled size of 0 to these functions is exposed to a denial-of-service condition.","state":0,"publishedAt":"2026-07-29T15:31:12+00:00","modifiedAt":"2026-09-10T03:50:51.243329+00:00","affected":[{"ecosystem":"npm","name":"nanoid","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"3.3.18"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"npm","name":"nanoid","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"4.0.0"},{"kind":"fixed","version":"5.1.6"}]}],"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-2026-67213","https://github.com/ai/nanoid/commit/cb3626d0f3342fdf179cd425fd9c4fbb92c7d0e7","https://github.com/ai/nanoid/commit/e10f8d40ce9d1ab47f66d65a16b48086432730d0","https://github.com/ai/nanoid/commit/f9d13f150847d117877adee3460a46eceb0cf49b","https://github.com/ai/nanoid","https://github.com/ai/nanoid/releases/tag/3.3.17","https://github.com/ai/nanoid/releases/tag/3.3.18","https://github.com/ai/nanoid/releases/tag/5.1.6","https://www.vulncheck.com/advisories/nanoid-before-infinite-loop-via-zero-size-in-customalphabet-and-customrandom"],"sourceUrl":"https://github.com/advisories/GHSA-2v37-7h3g-55p8","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-2v37-7h3g-55p8","identifiers":["GHSA-2v37-7h3g-55p8","CVE-2026-67213"]},"retained":false,"historicalAffected":[]}],"coverage":[]}