{"id":"CVE-2026-32284","aliases":["GHSA-h9q6-hc68-35rp","GO-2026-4513","GO-2026-4740"],"url":"https://o3.security/vulnerability/CVE-2026-32284","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.","published":"2026-03-26T19:40:51.686Z","modified":"2026-08-12T03:51:12.441958778Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/shamaton/msgpack/v2","fixedVersion":null},{"ecosystem":"Go","name":"github.com/shamaton/msgpack/v3","fixedVersion":null}],"fix":null,"references":[{"type":"WEB","url":"https://pkg.go.dev"},{"type":"WEB","url":"https://pkg.go.dev/vuln/GO-2026-4513"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/32xxx/CVE-2026-32284.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-32284"},{"type":"REPORT","url":"https://github.com/golang/vulndb/issues/4513"},{"type":"REPORT","url":"https://github.com/shamaton/msgpack/issues/59"},{"type":"EVIDENCE","url":"https://securityinfinity.com/research/shamaton-msgpack-oob-panic-fixext-dos-2026"},{"type":"PACKAGE","url":"https://github.com/shamaton/msgpack"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:12.441958778Z"}}