{"schema_version":"1.3.1","id":"GO-2026-4977","modified":"2026-05-07T19:21:40Z","published":"2026-05-07T19:21:40Z","aliases":["CVE-2026-42499"],"summary":"Quadratic string concatenation in consumePhrase in net/mail","details":"Pathological inputs could cause DoS through consumePhrase when parsing an email address according to RFC 5322.","affected":[{"package":{"name":"stdlib","ecosystem":"Go"},"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","ParseAddress","ParseAddressList","addrParser.consumePhrase"]}]}}],"references":[{"type":"REPORT","url":"https://go.dev/issue/78987"},{"type":"FIX","url":"https://go.dev/cl/771520"},{"type":"WEB","url":"https://groups.google.com/g/golang-announce/c/qcCIEXso47M"}],"database_specific":{"url":"https://pkg.go.dev/vuln/GO-2026-4977","review_status":"REVIEWED"}}