{"id":"CVE-2026-42504","revision":null,"records":[{"revision":"e599aacad81b4f0d81d20f65623ac20a","observedAt":"2026-10-24T11:27:26.817+00:00","statement":{"source":"cve-program","id":"CVE-2026-42504","aliases":[],"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":"2026-06-02T22:01:37.219+00:00","modifiedAt":"2026-10-24T10:23:22.241+00:00","affected":[{"ecosystem":"https://pkg.go.dev","name":"mime","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Go standard library\",\n                    \"product\": \"mime\",\n                    \"collectionURL\": \"https://pkg.go.dev\",\n                    \"packageName\": \"mime\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"1.25.11\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"1.26.0-0\",\n                            \"lessThan\": \"1.26.4\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ],\n                    \"programRoutines\": [\n                        {\n                            \"name\": \"WordDecoder.DecodeHeader\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\"\n                }"}],"metrics":[],"references":["https://go.dev/issue/79217","https://go.dev/cl/774481","https://groups.google.com/g/golang-announce/c/tKs3rmcBcKw","https://pkg.go.dev/vuln/GO-2026-5038"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-42504","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-42504","identifiers":["CVE-2026-42504"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-10-24T12:27:26.5379472+00:00","complete":true,"records":1756,"lastAttemptAt":"2026-10-24T12:27:26.5379472+00:00","lastSuccessAt":"2026-10-24T12:27:26.7550817+00:00","error":null,"lastVerifiedAt":"2026-10-24T12:27:26.7550851+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0},{"source":"cve-program","scope":"Official CVE Program baseline and cumulative hourly delta; all vendors, published and rejected records","generation":"cve-9b3cad78792c7367da03684feab05819ddebc4d137048bdbbdabdbb4d2879391-0bbce003c9651b1d76340a4d8abe194ac0945bd7026514b5b1caabe6533c3091","complete":true,"records":413884,"lastAttemptAt":"2026-10-24T12:27:26.4665408+00:00","lastSuccessAt":"2026-10-24T11:27:34.2720824+00:00","error":null,"lastVerifiedAt":"2026-10-24T12:27:26.4665408+00:00","snapshotPublishedAt":"2026-10-24T11:26:36+00:00","importing":false,"stagedRecords":0},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-10-24T12:27:26.5379472+00:00","complete":true,"records":1093,"lastAttemptAt":"2026-10-24T12:27:26.5379472+00:00","lastSuccessAt":"2026-10-24T12:27:26.7560474+00:00","error":null,"lastVerifiedAt":"2026-10-24T12:27:26.756048+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0},{"source":"osv:NuGet","scope":"Complete OSV NuGet ecosystem archive, including GitHub Advisory Database records; NuGet version matching only","generation":"nuget-16ad89dfea13ab9e9b0108e63a759d63bd4559cc68b58491107d62ee35bbbaf2","complete":true,"records":1965,"lastAttemptAt":"2026-10-24T12:27:26.5049862+00:00","lastSuccessAt":"2026-10-23T16:01:26.4487605+00:00","error":null,"lastVerifiedAt":"2026-10-24T12:27:26.5049862+00:00","snapshotPublishedAt":"2026-10-21T12:18:07+00:00","importing":false,"stagedRecords":0}]}