{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-42504", "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc", "state": "PUBLISHED", "assignerShortName": "Go", "dateReserved": "2026-04-28T00:21:12.792Z", "datePublished": "2026-06-02T22:01:37.219Z", "dateUpdated": "2026-06-02T22:01:37.219Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc", "shortName": "Go", "dateUpdated": "2026-06-02T22:01:37.219Z"}, "title": "Quadratic complexity in WordDecoder.DecodeHeader in mime", "descriptions": [{"lang": "en", "value": "Decoding a maliciously-crafted MIME header containing many invalid encoded-words can consume excessive CPU."}], "affected": [{"vendor": "Go standard library", "product": "mime", "collectionURL": "https://pkg.go.dev", "packageName": "mime", "versions": [{"version": "0", "lessThan": "1.25.11", "status": "affected", "versionType": "semver"}, {"version": "1.26.0-0", "lessThan": "1.26.4", "status": "affected", "versionType": "semver"}], "programRoutines": [{"name": "WordDecoder.DecodeHeader"}], "defaultStatus": "unaffected"}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "CWE-407: Inefficient Algorithmic Complexity"}]}], "references": [{"url": "https://go.dev/issue/79217"}, {"url": "https://go.dev/cl/774481"}, {"url": "https://groups.google.com/g/golang-announce/c/tKs3rmcBcKw"}, {"url": "https://pkg.go.dev/vuln/GO-2026-5038"}], "credits": [{"lang": "en", "value": "p4p3r (https://hackerone.com/p4p3r_hak)"}]}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "Decoding a maliciously-crafted MIME header containing many invalid encoded-words can consume excessive CPU."}], "id": "CVE-2026-42504", "lastModified": "2026-06-02T23:16:37.927", "metrics": {}, "published": "2026-06-02T23:16:37.927", "references": [{"source": "security@golang.org", "url": "https://go.dev/cl/774481"}, {"source": "security@golang.org", "url": "https://go.dev/issue/79217"}, {"source": "security@golang.org", "url": "https://groups.google.com/g/golang-announce/c/tKs3rmcBcKw"}, {"source": "security@golang.org", "url": "https://pkg.go.dev/vuln/GO-2026-5038"}], "sourceIdentifier": "security@golang.org", "vulnStatus": "Received"}

{}

{"created": "2026-06-03T04:15:24.752932+00:00", "updated": "2026-06-03T04:15:24.752950+00:00", "vendors": [], "weaknesses": ["CWE-442"]}