{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-86247", "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "state": "PUBLISHED", "assignerShortName": "apache", "dateReserved": "2026-09-06T10:13:13.570Z", "datePublished": "2026-09-23T12:31:53.210Z", "dateUpdated": "2026-09-23T12:31:53.210Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "shortName": "apache", "dateUpdated": "2026-09-23T12:31:53.210Z"}, "title": "Apache Tomcat Native: Client certificate requirements can be down-graded", "problemTypes": [{"descriptions": [{"description": "CWE-366 Race condition within a thread", "lang": "en", "cweId": "CWE-366", "type": "CWE"}]}], "source": {"discovery": "INTERNAL"}, "affected": [{"vendor": "Apache Software Foundation", "product": "Apache Tomcat Native", "versions": [{"status": "affected", "version": "2.0.0", "lessThanOrEqual": "2.0.15", "versionType": "semver"}, {"status": "affected", "version": "1.3.0", "lessThanOrEqual": "1.3.8", "versionType": "semver"}], "defaultStatus": "unaffected"}], "descriptions": [{"value": "Race condition within a thread vulnerability in Apache Tomcat Native allowed client certificate verification requirements to be down-graded for some configurations.\n\n\n\nThis issue affects Apache Tomcat Native: from 2.0.0 through 2.0.15, from 1.3.0 through 1.3.8. Unsupported versions may also be affected.\n\n\n\nUsers are recommended to upgrade to version 2.0.16 or 1.3.9, which fixes the issue.", "lang": "en", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>Race condition within a thread vulnerability in Apache Tomcat Native allowed client certificate verification requirements to be down-graded for some configurations.</p><p>This issue affects Apache Tomcat Native: from 2.0.0 through 2.0.15, from 1.3.0 through 1.3.8. Unsupported versions may also be affected.</p><p>Users are recommended to upgrade to version 2.0.16 or 1.3.9, which fixes the issue.</p>"}]}], "references": [{"url": "https://lists.apache.org/thread/obsson6zhvfg0wsp2bx602l61ltj87r1", "tags": ["vendor-advisory"]}], "metrics": [{"other": {"type": "Textual description of severity", "content": {"text": "moderate"}}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "x_generator": {"engine": "Vulnogram 1.0.3"}}}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Apache Tomcat Native", "vendor": "Apache Software Foundation", "versions": [{"lessThanOrEqual": "2.0.15", "status": "affected", "version": "2.0.0", "versionType": "semver"}, {"lessThanOrEqual": "1.3.8", "status": "affected", "version": "1.3.0", "versionType": "semver"}]}], "source": "security@apache.org"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Race condition within a thread vulnerability in Apache Tomcat Native allowed client certificate verification requirements to be down-graded for some configurations.\n\n\n\nThis issue affects Apache Tomcat Native: from 2.0.0 through 2.0.15, from 1.3.0 through 1.3.8. Unsupported versions may also be affected.\n\n\n\nUsers are recommended to upgrade to version 2.0.16 or 1.3.9, which fixes the issue."}], "id": "CVE-2026-86247", "lastModified": "2026-09-23T13:17:31.237", "metrics": {}, "published": "2026-09-23T13:17:31.237", "references": [{"source": "security@apache.org", "url": "https://lists.apache.org/thread/obsson6zhvfg0wsp2bx602l61ltj87r1"}], "sourceIdentifier": "security@apache.org", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-366"}], "source": "security@apache.org", "type": "Primary"}]}

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