{"id":"CVE-2026-42504","revision":"e599aacad81b4f0d81d20f65623ac20a","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":[]}