{"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":"2026-07-09T21:13:59.070Z"},"containers":{"cna":{"providerMetadata":{"orgId":"1bb62c36-49e3-4200-9d77-64a1400537cc","shortName":"Go","dateUpdated":"2026-07-09T21:13:59.070Z"},"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)"}]},"adp":[{"problemTypes":[{"descriptions":[{"type":"CWE","cweId":"CWE-407","lang":"en","description":"CWE-407 Inefficient Algorithmic Complexity"}]}],"metrics":[{"cvssV3_1":{"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"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-06-03T14:05:39.682615Z","id":"CVE-2026-42504","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-06-03T14:06:13.623Z"}}]}}