{"id":"CVE-2021-3121","aliases":["BIT-consul-2021-3121","BIT-protobuf-2021-3121","GHSA-c3h9-896r-86jm","GO-2021-0053"],"url":"https://o3.security/vulnerability/CVE-2021-3121","summary":"Improper Input Validation in GoGo Protobuf","details":"An issue was discovered in GoGo Protobuf before 1.3.2. plugin/unmarshal/unmarshal.go lacks certain index validation, aka the \"skippy peanut butter\" issue.","published":"2021-01-11T06:15:13.460Z","modified":"2026-07-09T01:31:11.068201Z","cvss":{"score":8.6,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/gogo/protobuf","fixedVersion":"1.3.2"}],"fix":{"url":"https://github.com/gogo/protobuf/commit/b03c65ea87cdc3521ede29f62fe3ce239267c1bc","label":"gogo/protobuf@b03c65e"},"references":[{"type":"WEB","url":"https://lists.apache.org/thread.html/r68032132c0399c29d6cdc7bd44918535da54060a10a12b1591328bff%40%3Cnotifications.skywalking.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/r88d69555cb74a129a7bf84838073b61259b4a3830190e05a3b87994e%40%3Ccommits.pulsar.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/rc1e9ff22c5641d73701ba56362fb867d40ed287cca000b131dcf4a44%40%3Ccommits.pulsar.apache.org%3E"},{"type":"ADVISORY","url":"https://discuss.hashicorp.com/t/hcsec-2021-23-consul-exposed-to-denial-of-service-in-gogo-protobuf-dependency/29025"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20210219-0006/"},{"type":"FIX","url":"https://github.com/gogo/protobuf/commit/b03c65ea87cdc3521ede29f62fe3ce239267c1bc"},{"type":"FIX","url":"https://github.com/gogo/protobuf/compare/v1.3.1...v1.3.2"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-09T01:31:11.068201Z"}}