{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-42499", "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc", "state": "PUBLISHED", "assignerShortName": "Go", "dateReserved": "2026-04-28T00:21:12.791Z", "datePublished": "2026-05-07T19:41:18.615Z", "dateUpdated": "2026-05-08T21:29:59.662Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc", "shortName": "Go", "dateUpdated": "2026-05-07T19:41:18.615Z"}, "title": "Quadratic string concatenation in consumePhrase in net/mail", "descriptions": [{"lang": "en", "value": "Pathological inputs could cause DoS through consumePhrase when parsing an email address according to RFC 5322."}], "affected": [{"vendor": "Go standard library", "product": "net/mail", "collectionURL": "https://pkg.go.dev", "packageName": "net/mail", "versions": [{"version": "0", "lessThan": "1.25.10", "status": "affected", "versionType": "semver"}, {"version": "1.26.0-0", "lessThan": "1.26.3", "status": "affected", "versionType": "semver"}], "programRoutines": [{"name": "addrParser.consumePhrase"}, {"name": "AddressParser.Parse"}, {"name": "AddressParser.ParseList"}, {"name": "Header.AddressList"}, {"name": "ParseAddress"}, {"name": "ParseAddressList"}], "defaultStatus": "unaffected"}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "CWE-407: Inefficient Algorithmic Complexity"}]}], "references": [{"url": "https://go.dev/issue/78987"}, {"url": "https://go.dev/cl/771520"}, {"url": "https://groups.google.com/g/golang-announce/c/qcCIEXso47M"}, {"url": "https://pkg.go.dev/vuln/GO-2026-4977"}]}, "adp": [{"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2026-05-08T16:55:28.873015Z", "id": "CVE-2026-42499", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-08T21:29:59.662Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2026-42499", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-05-08T16:55:28.873015Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-08T16:55:43.428Z"}}], "cna": {"title": "Quadratic string concatenation in consumePhrase in net/mail", "affected": [{"vendor": "Go standard library", "product": "net/mail", "versions": [{"status": "affected", "version": "0", "lessThan": "1.25.10", "versionType": "semver"}, {"status": "affected", "version": "1.26.0-0", "lessThan": "1.26.3", "versionType": "semver"}], "packageName": "net/mail", "collectionURL": "https://pkg.go.dev", "defaultStatus": "unaffected", "programRoutines": [{"name": "addrParser.consumePhrase"}, {"name": "AddressParser.Parse"}, {"name": "AddressParser.ParseList"}, {"name": "Header.AddressList"}, {"name": "ParseAddress"}, {"name": "ParseAddressList"}]}], "references": [{"url": "https://go.dev/issue/78987"}, {"url": "https://go.dev/cl/771520"}, {"url": "https://groups.google.com/g/golang-announce/c/qcCIEXso47M"}, {"url": "https://pkg.go.dev/vuln/GO-2026-4977"}], "descriptions": [{"lang": "en", "value": "Pathological inputs could cause DoS through consumePhrase when parsing an email address according to RFC 5322."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "CWE-407: Inefficient Algorithmic Complexity"}]}], "providerMetadata": {"orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc", "shortName": "Go", "dateUpdated": "2026-05-07T19:41:18.615Z"}}}, "cveMetadata": {"cveId": "CVE-2026-42499", "state": "PUBLISHED", "dateUpdated": "2026-05-08T21:29:59.662Z", "dateReserved": "2026-04-28T00:21:12.791Z", "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc", "datePublished": "2026-05-07T19:41:18.615Z", "assignerShortName": "Go"}, "dataVersion": "5.2"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*", "matchCriteriaId": "1C966EF3-C51C-4239-B5FC-C44A5202FEC8", "versionEndExcluding": "1.25.10", "vulnerable": true}, {"criteria": "cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*", "matchCriteriaId": "522E4CD0-2B99-4363-9C78-0BAFD988A2D6", "versionEndExcluding": "1.26.3", "versionStartIncluding": "1.26.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Pathological inputs could cause DoS through consumePhrase when parsing an email address according to RFC 5322."}], "id": "CVE-2026-42499", "lastModified": "2026-05-13T16:59:17.563", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2026-05-07T20:16:44.540", "references": [{"source": "security@golang.org", "tags": ["Patch"], "url": "https://go.dev/cl/771520"}, {"source": "security@golang.org", "tags": ["Issue Tracking"], "url": "https://go.dev/issue/78987"}, {"source": "security@golang.org", "tags": ["Release Notes"], "url": "https://groups.google.com/g/golang-announce/c/qcCIEXso47M"}, {"source": "security@golang.org", "tags": ["Vendor Advisory"], "url": "https://pkg.go.dev/vuln/GO-2026-4977"}], "sourceIdentifier": "security@golang.org", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,1.25.10)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[1.26.0-0,1.26.3)"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 98.0, "source": "matching"}]}, "original": {"product": "net/mail", "source": "cna", "vendor": "Go standard library"}, "product": "net\\/mail", "vendor": "go_standard_library"}], "created": "2026-05-07T22:00:11.894462+00:00", "updated": "2026-05-13T20:45:04.198441+00:00", "vendors": ["go_standard_library", "go_standard_library$PRODUCT$net\\/mail"], "weaknesses": ["CWE-229", "CWE-730"]}