{"schema_version":"1.7.5","id":"GO-2026-4513","published":"2026-03-16T20:27:23Z","modified":"2026-05-29T02:29:18.915551189Z","aliases":["CVE-2026-32284","GHSA-h9q6-hc68-35rp","GO-2026-4740"],"related":["CGA-xwfm-7hvm-p6pw"],"summary":"Denial of service in github.com/shamaton/msgpack","details":"The msgpack decoder fails to properly validate the input buffer length when processing truncated fixext data (format codes 0xd4-0xd8). This can lead to an out-of-bounds read and a runtime panic, allowing a denial of service attack.","affected":[{"package":{"name":"github.com/shamaton/msgpack","ecosystem":"Go","purl":"pkg:golang/github.com/shamaton/msgpack"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"}]}],"ecosystem_specific":{"imports":[{"path":"github.com/shamaton/msgpack","symbols":["DecodeStructAsArray","DecodeStructAsMap","Unmarshal","UnmarshalAsArray","UnmarshalAsMap"]}]},"database_specific":{"source":"https://vuln.go.dev/ID/GO-2026-4513.json"}},{"package":{"name":"github.com/shamaton/msgpack/v2","ecosystem":"Go","purl":"pkg:golang/github.com/shamaton/msgpack/v2"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"}]}],"ecosystem_specific":{"imports":[{"path":"github.com/shamaton/msgpack/v2","symbols":["Unmarshal","UnmarshalAsArray","UnmarshalAsMap"]}]},"database_specific":{"source":"https://vuln.go.dev/ID/GO-2026-4513.json"}},{"package":{"name":"github.com/shamaton/msgpack/v3","ecosystem":"Go","purl":"pkg:golang/github.com/shamaton/msgpack/v3"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"}]}],"ecosystem_specific":{"imports":[{"path":"github.com/shamaton/msgpack/v3","symbols":["Unmarshal","UnmarshalAsArray","UnmarshalAsMap"]}]},"database_specific":{"source":"https://vuln.go.dev/ID/GO-2026-4513.json"}}],"references":[{"type":"REPORT","url":"https://github.com/shamaton/msgpack/issues/59"},{"type":"REPORT","url":"https://github.com/golang/vulndb/issues/4513"}],"database_specific":{"review_status":"REVIEWED","url":"https://pkg.go.dev/vuln/GO-2026-4513"}}