{"schema_version":"1.7.5","id":"BIT-golang-2026-42504","published":"2026-06-05T05:45:23.268Z","modified":"2026-06-05T07:56:10.834971373Z","aliases":["CVE-2026-42504","GO-2026-5038"],"summary":"Quadratic complexity in WordDecoder.DecodeHeader in mime","details":"Decoding a maliciously-crafted MIME header containing many invalid encoded-words can consume excessive CPU.","affected":[{"package":{"name":"golang","ecosystem":"Bitnami","purl":"pkg:bitnami/golang"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.25.11"},{"introduced":"1.26.0-0"},{"fixed":"1.26.4"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/golang/BIT-golang-2026-42504.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}],"references":[{"type":"WEB","url":"https://go.dev/cl/774481"},{"type":"WEB","url":"https://go.dev/issue/79217"},{"type":"WEB","url":"https://groups.google.com/g/golang-announce/c/tKs3rmcBcKw"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-42504"},{"type":"WEB","url":"https://pkg.go.dev/vuln/GO-2026-5038"}],"database_specific":{"cpes":["cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*"],"severity":"High"}}