{"id":"GO-2026-5038","revision":"7c8bc3a6cc5d434f92775cbb3ced06bc","records":[{"revision":"7c8bc3a6cc5d434f92775cbb3ced06bc","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GO-2026-5038","aliases":["BIT-golang-2026-42504","CVE-2026-42504"],"title":"Quadratic complexity in WordDecoder.DecodeHeader in mime","description":"Decoding a maliciously-crafted MIME header containing many invalid encoded-words can consume excessive CPU.","state":0,"publishedAt":"2026-06-02T21:39:47+00:00","modifiedAt":"2026-10-20T10:42:25.4506701+00:00","affected":[{"ecosystem":"Go","name":"stdlib","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"1.25.11"},{"kind":"introduced","version":"1.26.0-0"},{"kind":"fixed","version":"1.26.4"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[],"references":["https://go.dev/issue/79217","https://go.dev/cl/774481","https://groups.google.com/g/golang-announce/c/tKs3rmcBcKw"],"sourceUrl":"https://osv.dev/vulnerability/GO-2026-5038","license":"OSV · upstream source license applies","key":"osv:GO-2026-5038","identifiers":["GO-2026-5038","BIT-golang-2026-42504","CVE-2026-42504"]},"retained":false,"historicalAffected":[]}],"coverage":[]}