{"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": "2026-09-23T15:30:52.270Z"}, "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"}}, "adp": [{"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.4, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2026-09-23T15:30:32.467469Z", "id": "CVE-2026-86247", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-23T15:30:52.270Z"}}]}}

{"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": "2026-09-23T15:30:52.270Z"}, "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"}}, "adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.4, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2026-86247", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-09-23T15:30:32.467469Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-23T15:30:49.112Z"}}]}}

{"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": "[email protected]"}], "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": "2026-09-23T16:16:46.593", "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": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-86247", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-09-23T15:30:32.467469Z", "version": "2.0.3"}}]}, "published": "2026-09-23T13:17:31.237", "references": [{"source": "[email protected]", "url": "https://lists.apache.org/thread/obsson6zhvfg0wsp2bx602l61ltj87r1"}], "sourceIdentifier": "[email protected]", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-366"}], "source": "[email protected]", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[2.0.0,2.0.15]"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[1.3.0,1.3.8]"}}], "enrichment": {"confidence": 85.0, "confidence_source": "matching", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 85.0, "source": "matching"}]}, "original": {"product": "Apache Tomcat Native", "source": "cna", "vendor": "Apache Software Foundation"}, "product": "apache_tomcat", "vendor": "apache"}], "created": "2026-09-23T14:15:06.441256+00:00", "updated": "2026-09-23T15:36:41.330829+00:00", "vendors": ["apache", "apache$PRODUCT$apache_tomcat"]}