CVE-2026-42504

{"id": "CVE-2026-42504", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-42504", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-06-03T14:05:39.682615Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "affected": [{"source": "security@golang.org", "affectedData": [{"vendor": "Go standard library", "product": "mime", "versions": [{"status": "affected", "version": "0", "lessThan": "1.25.11", "versionType": "semver"}, {"status": "affected", "version": "1.26.0-0", "lessThan": "1.26.4", "versionType": "semver"}], "packageName": "mime", "collectionURL": "https://pkg.go.dev", "defaultStatus": "unaffected", "programRoutines": [{"name": "WordDecoder.DecodeHeader"}]}]}], "published": "2026-06-02T23:16:37.927", "references": [{"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", "source": "security@golang.org"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-407"}]}], "descriptions": [{"lang": "en", "value": "Decoding a maliciously-crafted MIME header containing many invalid encoded-words can consume excessive CPU."}, {"lang": "es", "value": "La decodificaci\u00f3n de un encabezado MIME malintencionado que contiene muchas palabras codificadas no v\u00e1lidas puede consumir excesiva CPU."}], "lastModified": "2026-07-22T19:10:00.120", "sourceIdentifier": "security@golang.org"}