{"id":"GO-2026-4986","aliases":["BIT-golang-2026-39820","CVE-2026-39820"],"title":"Quadratic string concatentation in consumeComment in net/mail","titleSource":"OSV","descriptionSource":"OSV","description":"Well-crafted inputs reaching ParseAddress, ParseAddressList, and ParseDate were able to trigger excessive CPU exhaustion and memory allocations.","severity":"unknown","score":null,"published":"2026-05-07T19:21:40.000Z","modified":"2026-11-14T13:12:13.740Z","withdrawn":false,"knownExploited":false,"affected":[{"ecosystem":"Go","name":"stdlib","sources":[{"name":"OSV · GO-2026-4986","url":"https://osv.dev/vulnerability/GO-2026-4986"}],"ranges":[{"events":[{"introduced":"0"},{"fixed":"1.25.10"},{"introduced":"1.26.0-0"},{"fixed":"1.26.3"}],"type":"SEMVER"}],"versions":[],"fixed":["1.25.10","1.26.3"]}],"sourceAffected":[],"references":["https://go.dev/issue/78566","https://go.dev/cl/759940","https://groups.google.com/g/golang-announce/c/qcCIEXso47M"],"sources":[{"name":"OSV","id":"GO-2026-4986","modified":"2026-11-14T13:12:13.740284192Z","url":"https://osv.dev/vulnerability/GO-2026-4986"}],"assessments":[],"products":[],"remediation":[],"observedAt":"2026-11-14T15:04:33.663Z","kev":{"status":"not-listed","checkedAt":"2026-11-15T02:10:31.937Z"},"coverage":[{"source":"NVD","status":"refresh-failed","attemptedAt":"2026-11-14T00:25:35.348Z"},{"source":"GHSA","status":"available","checkedAt":"2026-11-14T00:15:33.101Z","attemptedAt":"2026-11-14T00:15:33.101Z"},{"source":"EUVD","status":"available","checkedAt":"2026-11-14T00:15:33.261Z","attemptedAt":"2026-11-14T00:15:33.261Z"},{"source":"EPSS","status":"available","checkedAt":"2026-11-14T00:15:32.646Z","attemptedAt":"2026-11-14T00:15:32.646Z"}],"evidence":[{"source":"FIRST EPSS","id":"CVE-2026-39820","url":"https://www.first.org/epss/","probability":0.00784,"percentile":0.56593,"date":"2026-11-13","checkedAt":"2026-11-14T00:15:32.646Z"},{"source":"GitHub Advisory Database","id":"GHSA-p9h5-jm8x-mjm5","url":"https://github.com/advisories/GHSA-p9h5-jm8x-mjm5","modified":"2026-09-17T12:33:05Z","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","checkedAt":"2026-11-14T00:15:33.101Z"},{"source":"ENISA EUVD","id":"EUVD-2026-28423","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-28423","modified":"Sep 18, 2026, 12:04:51 PM","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","checkedAt":"2026-11-14T00:15:33.261Z"}],"aiSummary":null}