{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-27138", "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc", "state": "PUBLISHED", "assignerShortName": "Go", "dateReserved": "2026-02-17T19:57:28.435Z", "datePublished": "2026-03-06T21:28:14.000Z", "dateUpdated": "2026-03-10T13:35:19.784Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc", "shortName": "Go", "dateUpdated": "2026-03-08T05:56:21.000Z"}, "title": "Panic in name constraint checking for malformed certificates in crypto/x509", "descriptions": [{"lang": "en", "value": "Certificate verification can panic when a certificate in the chain has an empty DNS name and another certificate in the chain has excluded name constraints. This can crash programs that are either directly verifying X.509 certificate chains, or those that use TLS."}], "affected": [{"vendor": "Go standard library", "product": "crypto/x509", "collectionURL": "https://pkg.go.dev", "packageName": "crypto/x509", "versions": [{"version": "1.26.0-0", "lessThan": "1.26.1", "status": "affected", "versionType": "semver"}], "programRoutines": [{"name": "dnsConstraints.query"}, {"name": "Certificate.Verify"}], "defaultStatus": "unaffected"}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "CWE-1285: Improper Validation of Specified Index, Position, or Offset in Input"}]}], "references": [{"url": "https://groups.google.com/g/golang-announce/c/EdhZqrQ98hk"}, {"url": "https://go.dev/issue/77953"}, {"url": "https://go.dev/cl/752183"}, {"url": "https://pkg.go.dev/vuln/GO-2026-4600"}], "credits": [{"lang": "en", "value": "Jakub Ciolek"}]}, "adp": [{"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.9, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2026-03-10T13:34:15.972110Z", "id": "CVE-2026-27138", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"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": "2026-03-10T13:35:19.784Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.9, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2026-27138", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-03-10T13:34:15.972110Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-03-10T13:35:03.116Z"}}], "cna": {"title": "Panic in name constraint checking for malformed certificates in crypto/x509", "credits": [{"lang": "en", "value": "Jakub Ciolek"}], "affected": [{"vendor": "Go standard library", "product": "crypto/x509", "versions": [{"status": "affected", "version": "1.26.0-0", "lessThan": "1.26.1", "versionType": "semver"}], "packageName": "crypto/x509", "collectionURL": "https://pkg.go.dev", "defaultStatus": "unaffected", "programRoutines": [{"name": "dnsConstraints.query"}, {"name": "Certificate.Verify"}]}], "references": [{"url": "https://groups.google.com/g/golang-announce/c/EdhZqrQ98hk"}, {"url": "https://go.dev/issue/77953"}, {"url": "https://go.dev/cl/752183"}, {"url": "https://pkg.go.dev/vuln/GO-2026-4600"}], "descriptions": [{"lang": "en", "value": "Certificate verification can panic when a certificate in the chain has an empty DNS name and another certificate in the chain has excluded name constraints. This can crash programs that are either directly verifying X.509 certificate chains, or those that use TLS."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "CWE-1285: Improper Validation of Specified Index, Position, or Offset in Input"}]}], "providerMetadata": {"orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc", "shortName": "Go", "dateUpdated": "2026-03-08T05:56:21.000Z"}}}, "cveMetadata": {"cveId": "CVE-2026-27138", "state": "PUBLISHED", "dateUpdated": "2026-03-10T13:35:19.784Z", "dateReserved": "2026-02-17T19:57:28.435Z", "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc", "datePublished": "2026-03-06T21:28:14.000Z", "assignerShortName": "Go"}, "dataVersion": "5.2"}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "Certificate verification can panic when a certificate in the chain has an empty DNS name and another certificate in the chain has excluded name constraints. This can crash programs that are either directly verifying X.509 certificate chains, or those that use TLS."}, {"lang": "es", "value": "La verificaci\u00f3n de certificados puede entrar en p\u00e1nico cuando un certificado en la cadena tiene un nombre DNS vac\u00edo y otro certificado en la cadena tiene restricciones de nombre excluidas. Esto puede bloquear programas que est\u00e1n verificando directamente cadenas de certificados X.509, o aquellos que usan TLS."}], "id": "CVE-2026-27138", "lastModified": "2026-03-10T18:18:44.420", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 5.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 3.6, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2026-03-06T22:16:00.963", "references": [{"source": "security@golang.org", "url": "https://go.dev/cl/752183"}, {"source": "security@golang.org", "url": "https://go.dev/issue/77953"}, {"source": "security@golang.org", "url": "https://groups.google.com/g/golang-announce/c/EdhZqrQ98hk"}, {"source": "security@golang.org", "url": "https://pkg.go.dev/vuln/GO-2026-4600"}], "sourceIdentifier": "security@golang.org", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "crypto/x509: Panic in name constraint checking for malformed certificates in crypto/x509", "id": "2445344", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2445344"}, "csaw": false, "cvss3": {"cvss3_base_score": "3.7", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L", "status": "draft"}, "cwe": "CWE-295", "details": ["No description is available for this CVE."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."}, "name": "CVE-2026-27138", "package_state": [{"cpe": "cpe:/a:redhat:service_mesh:2", "fix_state": "Fix deferred", "package_name": "openshift-golang-builder-container", "product_name": "OpenShift Service Mesh 2"}, {"cpe": "cpe:/a:redhat:service_mesh:3", "fix_state": "Fix deferred", "package_name": "openshift-golang-builder-container", "product_name": "OpenShift Service Mesh 3"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "golang", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "go-toolset:rhel8/golang", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "golang", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:enterprise_linux_ai:3", "fix_state": "Fix deferred", "package_name": "golang", "product_name": "Red Hat Enterprise Linux AI (RHEL AI) 3"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift-golang-builder-container", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:container_native_virtualization:4", "fix_state": "Fix deferred", "package_name": "openshift-golang-builder-container", "product_name": "Red Hat OpenShift Virtualization 4"}], "public_date": "2026-03-06T21:28:14Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-27138\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-27138\nhttps://go.dev/cl/752183\nhttps://go.dev/issue/77953\nhttps://groups.google.com/g/golang-announce/c/EdhZqrQ98hk\nhttps://pkg.go.dev/vuln/GO-2026-4600"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,1.26.1)"}}], "enrichment": {"confidence": 89.0, "confidence_source": "matching", "scores": [{"score": 89.0, "source": "matching"}]}, "original": {"product": "crypto/x509", "source": "cna", "vendor": "Go standard library"}, "product": "crypto_tls", "vendor": "go_standard_library"}], "created": "2026-03-09T10:06:45.153588+00:00", "updated": "2026-03-09T10:06:45.153670+00:00", "vendors": ["go_standard_library", "go_standard_library$PRODUCT$crypto_tls"]}