{"id":"CVE-2018-3711","aliases":["EUVD-2018-0299","GHSA-mq6c-fh97-4gwv"],"status":"published","title":"Denial of Service vulnerability with large JSON payloads in fastify","description":"Fastify node module before 0.38.0 is vulnerable to a denial-of-service attack by sending a request with \"Content-Type: application/json\" and a very large payload.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.01771,"percentile":0.78295,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-400","CWE-770"],"published":"2018-06-07T02:00:00Z","modified":"2026-10-20T10:50:27Z","fixes":[{"ecosystem":"npm","package":"fastify","fixed_in":["0.38.0"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"fastify","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"0.37.0"},{"fixed":"0.38.0"}]}]},{"source":"osv","ecosystem":"npm","package":"fastify","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.38.0"}]}]}],"products":[{"vendor":"fastify","product":"fastify"},{"vendor":"hackerone","product":"fastify node module"}],"references":[{"url":"https://github.com/fastify/fastify/pull/627","tags":["x_refsource_MISC","x_transferred","Exploit","Issue Tracking","Third Party Advisory","report","web"]},{"url":"https://hackerone.com/reports/303632","tags":["x_refsource_MISC","x_transferred","Exploit","Issue Tracking","Third Party Advisory","report","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-3711","tags":["advisory"]},{"url":"https://github.com/fastify/fastify/commit/fabd2a011f2ffbb877394abe699f549513ffbd76","tags":["web"]},{"url":"https://github.com/advisories/GHSA-mq6c-fh97-4gwv","tags":["advisory"]},{"url":"https://www.npmjs.com/advisories/564","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2018-3711","description":"Fastify node module before 0.38.0 is vulnerable to a denial-of-service attack by sending a request with \"Content-Type: application/json\" and a very large payload.","status":"published","published":"2018-06-07T02:00:00Z","modified":"2024-09-16T18:24:04.599Z","cwes":["CWE-770"],"updated_at":"2026-11-02T14:35:05.619113Z"}],"euvd":[{"id":"EUVD-2018-0299","description":"Fastify node module before 0.38.0 is vulnerable to a denial-of-service attack by sending a request with \"Content-Type: application/json\" and a very large payload.","status":"published","published":"2018-06-07T02:00:00Z","modified":"2024-09-16T18:24:04Z","updated_at":"2026-11-03T00:55:32.945265Z"}],"ghsa":[{"id":"GHSA-mq6c-fh97-4gwv","title":"Denial of Service vulnerability with large JSON payloads in fastify","description":"Affected versions of `fastify` are vulnerable to a denial of service when processing a request with `Content-Type` set to `application/json` and a very large payload.\n\n\n## Recommendation\n\nUpdate to version 0.38.0 or later.","status":"published","published":"2018-07-18T21:20:34Z","modified":"2023-04-11T00:28:34Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-400","CWE-770"],"updated_at":"2026-11-02T14:36:50.476488Z"}],"nvd":[{"id":"CVE-2018-3711","description":"Fastify node module before 0.38.0 is vulnerable to a denial-of-service attack by sending a request with \"Content-Type: application/json\" and a very large payload.","status":"published","published":"2018-06-07T02:29:07.847Z","modified":"2026-06-17T01:57:42.337Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T14:04:28.483469Z"}],"osv":[{"id":"CVE-2018-3711","description":"Fastify node module before 0.38.0 is vulnerable to a denial-of-service attack by sending a request with \"Content-Type: application/json\" and a very large payload.","status":"published","published":"2018-06-07T02:29:07.847Z","modified":"2026-10-20T10:50:27.427303783Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:09.442568Z"},{"id":"GHSA-mq6c-fh97-4gwv","title":"Denial of Service vulnerability with large JSON payloads in fastify","description":"Affected versions of `fastify` are vulnerable to a denial of service when processing a request with `Content-Type` set to `application/json` and a very large payload.\n\n\n## Recommendation\n\nUpdate to version 0.38.0 or later.","status":"published","published":"2018-07-18T21:20:34Z","modified":"2023-11-08T04:00:16.56731Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-400","CWE-770"],"updated_at":"2026-11-02T15:46:52.170928Z"}]}}