CVE-2026-42011

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-42011", "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "state": "PUBLISHED", "assignerShortName": "redhat", "dateReserved": "2026-04-23T11:23:46.517Z", "datePublished": "2026-05-07T13:51:04.695Z", "dateUpdated": "2026-11-11T12:41:31.479Z"}, "containers": {"cna": {"title": "Gnutls: gnutls: security bypass due to incorrect name constraint handling", "metrics": [{"other": {"content": {"value": "Moderate", "namespace": "https://access.redhat.com/security/updates/classification/"}, "type": "Red Hat severity rating"}}, {"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.4, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N", "version": "3.1"}, "format": "CVSS"}], "descriptions": [{"lang": "en", "value": "A flaw was found in gnutls. This vulnerability occurs because permitted name constraints were incorrectly ignored when previous Certificate Authorities (CAs) only had excluded name constraints. A remote attacker could exploit this to bypass critical name constraint checks during certificate validation. This bypass could lead to the acceptance of invalid certificates, potentially enabling spoofing or man-in-the-middle attacks against affected systems."}], "affected": [{"versions": [{"status": "affected", "version": "0"}], "packageName": "gnutls", "collectionURL": "https://gitlab.com/gnutls/gnutls"}, {"vendor": "Red Hat", "product": "Red Hat Enterprise Linux 10", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "gnutls", "defaultStatus": "affected", "versions": [{"version": "0:3.8.10-4.el10_2", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": ["cpe:/o:redhat:enterprise_linux:10.2"]}, {"vendor": "Red Hat", "product": "Red Hat Enterprise Linux 10.0 Extended Update Support", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "gnutls", "defaultStatus": "affected", "versions": [{"version": "0:3.8.9-9.el10_0.19", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], 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[{"lang": "en", "value": "A flaw was found in gnutls. This vulnerability occurs because permitted name constraints were incorrectly ignored when previous Certificate Authorities (CAs) only had excluded name constraints. A remote attacker could exploit this to bypass critical name constraint checks during certificate validation. This bypass could lead to the acceptance of invalid certificates, potentially enabling spoofing or man-in-the-middle attacks against affected systems."}, {"lang": "es", "value": "Se encontr\u00f3 una falla en gnutls. Esta vulnerabilidad ocurre porque las restricciones de nombre permitidas fueron ignoradas incorrectamente cuando las Autoridades de Certificaci\u00f3n (CA) anteriores solo ten\u00edan restricciones de nombre excluidas. Un atacante remoto podr\u00eda explotar esto para eludir las comprobaciones cr\u00edticas de restricciones de nombre durante la validaci\u00f3n de certificados. Esta elusi\u00f3n podr\u00eda llevar a la aceptaci\u00f3n de certificados no v\u00e1lidos, lo que podr\u00eda permitir ataques de suplantaci\u00f3n de identidad o man-in-the-middle contra sistemas afectados."}], "id": "CVE-2026-42011", "lastModified": "2026-11-11T13:17:26.417", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.4, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 5.2, "source": "secalert@redhat.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-42011", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-05-07T00:00:00+00:00", "version": "2.0.3"}}]}, "published": "2026-05-07T15:16:09.760", "references": [{"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:13274"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:20611"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:20612"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:20613"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:26319"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:26409"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:29197"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:30004"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:30849"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:30850"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:32962"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:33125"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:40762"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:41921"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:43575"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:56853"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:57483"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:58981"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:59831"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:60019"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:72502"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:74674"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:82304"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:82322"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:82347"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:82354"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:82372"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:82857"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:82888"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:89197"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:89232"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:89333"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:95508"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:95745"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:95755"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/security/cve/CVE-2026-42011"}, {"source": "secalert@redhat.com", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2467437"}, {"source": "secalert@redhat.com", "url": "https://www.gnutls.org/security-new.html#GNUTLS-SA-2026-04-29-6"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-295"}], "source": "secalert@redhat.com", "type": "Secondary"}]}

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