{"id":"CVE-2026-107275","state":"PUBLISHED","title":"@fastify/jwt vulnerable to missing token expiration when temporal options cannot be parsed","description":"@fastify/jwt is a JSON Web Token plugin for the Fastify web framework. In versions before 10.2.3, a time span passed to expiresIn, notBefore, or maxAge that the plugin's parser cannot read, such as a compound span, a month unit, an ISO 8601 duration, a decimal comma, or a value with surrounding whitespace, is silently dropped instead of refused. On the signing path this produces a token with no expiration claim that never expires, and on the verification path a configured maxAge stops being enforced, so a token that should be rejected for age is accepted. The issue is fixed in @fastify/jwt 10.2.3, and users should upgrade to 10.2.3 or later. As a workaround, pass these options as a number of seconds, or verify that any time-span string parses to a finite value before relying on it.","publishedAt":"2026-10-08T11:05:40.492Z","updatedAt":"2026-10-08T14:21:22.066Z","severity":{"score":6.8,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N","source":"openjs"},"assigner":"openjs","products":["@fastify/jwt @fastify/jwt"],"affected":[{"vendor":"@fastify/jwt","product":"@fastify/jwt","packageURL":"pkg:npm/@fastify/jwt","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"10.2.3","versionType":"semver"},{"version":"10.2.3","status":"unaffected","versionType":"semver"}]}],"references":["https://github.com/fastify/fastify-jwt/security/advisories/GHSA-9x4w-r9p5-5h7m","https://cna.openjsf.org/security-advisories.html"],"weaknesses":["CWE-390","CWE-613","CWE-754"],"ingestedAt":"2026-10-29T20:10:23.711Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/107xxx/CVE-2026-107275.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-107275","state":"PUBLISHED","datePublished":"2026-10-08T11:05:40.492Z","dateUpdated":"2026-10-08T14:21:22.066Z","assignerShortName":"openjs","assignerOrgId":"ce714d77-add3-4f53-aff5-83d477b104bb","dateReserved":"2026-10-07T15:36:05.942Z"},"containers":{"cna":{"title":"@fastify/jwt vulnerable to missing token expiration when temporal options cannot be parsed","descriptions":[{"lang":"en","value":"@fastify/jwt is a JSON Web Token plugin for the Fastify web framework. 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