{"id":"CVE-2021-3127","aliases":["BIT-nats-2021-3127","GHSA-62mh-w5cv-p88c","GHSA-9r5x-fjv3-q6h4","GHSA-j756-f273-xhp4","GO-2022-0386"],"url":"https://o3.security/vulnerability/CVE-2021-3127","summary":"nats-io/jwt not enforcing checking of Import token permissions","details":"NATS Server 2.x before 2.2.0 and JWT library before 2.0.1 have Incorrect Access Control because Import Token bindings are mishandled.","published":"2021-03-16T20:15:13.300Z","modified":"2026-07-09T01:25:14.184903Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"Go","name":"github.com/nats-io/jwt","fixedVersion":null},{"ecosystem":"Go","name":"github.com/nats-io/jwt/v2","fixedVersion":"2.0.1"}],"fix":null,"references":[{"type":"EVIDENCE","url":"https://advisories.nats.io/CVE/CVE-2021-3127.txt"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-09T01:25:14.184903Z"}}