{"schema_version":"1.7.5","id":"GO-2026-4986","published":"2026-05-07T19:21:40Z","modified":"2026-09-10T10:41:34.081762746Z","aliases":["BIT-golang-2026-39820","CVE-2026-39820"],"related":["RHSA-2026:22112","RHSA-2026:22120","RHSA-2026:22121","RHSA-2026:23262","RHSA-2026:23264","RHSA-2026:49702","RHSA-2026:49712","RHSA-2026:51112","RHSA-2026:54552","RHSA-2026:54883","RHSA-2026:56852","RHSA-2026:57401","RHSA-2026:57482","RHSA-2026:57649","RHSA-2026:57845","RHSA-2026:57914","RHSA-2026:59830","RHSA-2026:60018","RHSA-2026:61253","RHSA-2026:62406","RHSA-2026:62407","RHSA-2026:62753","RHSA-2026:62754","RHSA-2026:62803","RHSA-2026:63022","RHSA-2026:65116","RHSA-2026:65117","RHSA-2026:65153","RHSA-2026:65335","RHSA-2026:65336","RHSA-2026:65534","RHSA-2026:65886","RHSA-2026:65895","RHSA-2026:66016","RHSA-2026:66327"],"summary":"Quadratic string concatentation in consumeComment in net/mail","details":"Well-crafted inputs reaching ParseAddress, ParseAddressList, and ParseDate were able to trigger excessive CPU exhaustion and memory allocations.","affected":[{"package":{"name":"stdlib","ecosystem":"Go","purl":"pkg:golang/stdlib"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.25.10"},{"introduced":"1.26.0-0"},{"fixed":"1.26.3"}]}],"ecosystem_specific":{"imports":[{"path":"net/mail","symbols":["AddressParser.Parse","AddressParser.ParseList","Header.AddressList","Header.Date","ParseAddress","ParseAddressList","ParseDate","addrParser.consumeComment"]}]},"database_specific":{"source":"https://vuln.go.dev/ID/GO-2026-4986.json"}}],"references":[{"type":"REPORT","url":"https://go.dev/issue/78566"},{"type":"FIX","url":"https://go.dev/cl/759940"},{"type":"WEB","url":"https://groups.google.com/g/golang-announce/c/qcCIEXso47M"}],"database_specific":{"review_status":"REVIEWED","url":"https://pkg.go.dev/vuln/GO-2026-4986"},"credits":[{"name":"thatnealpatel"}]}