CVE-2026-86243

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-86243", "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "state": "PUBLISHED", "assignerShortName": "apache", "dateReserved": "2026-09-06T09:21:33.313Z", "datePublished": "2026-09-23T12:24:55.119Z", "dateUpdated": "2026-09-23T18:10:48.694Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "shortName": "apache", "dateUpdated": "2026-09-23T12:24:55.119Z"}, "title": "Apache Tomcat Native: DoS via TLS handshake", "problemTypes": [{"descriptions": [{"description": "CWE-126 Buffer over-read", "lang": "en", "cweId": "CWE-126", "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": "Buffer over-read vulnerability in Apache Tomcat Native during the TLS handshake permits a malicious user to trigger a DoS via a JVM crash.\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. Earlier, unsupported versions may also be affected.\n\n\n\nUsers are recommended to upgrade to version 1.3.9 or 2.0.16, which fix the issue.", "lang": "en", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>Buffer over-read vulnerability in Apache Tomcat Native during the TLS handshake permits a malicious user to trigger a DoS via a JVM crash.</p><p>This issue affects Apache Tomcat Native: from 2.0.0 through 2.0.15, from 1.3.0 through 1.3.8. Earlier, unsupported versions may also be affected.</p><p>Users are recommended to upgrade to version 1.3.9 or 2.0.16, which fix the issue.</p>"}]}], "references": [{"url": "https://lists.apache.org/thread/8p4jf02w54m22x0cwpq2x53w3ov8o557", "tags": ["vendor-advisory"]}], "metrics": [{"other": {"type": "Textual description of severity", "content": {"text": "important"}}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "x_generator": {"engine": "Vulnogram 1.0.3"}}, "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": "2026-09-23T15:28:53.132953Z", "id": "CVE-2026-86243", "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": "2026-09-23T15:29:11.463Z"}}, {"title": "CVE Program Container", "references": [{"url": "http://www.openwall.com/lists/oss-security/2026/09/23/31"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2026-09-23T18:10:48.694Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CVE Program Container", "references": [{"url": "http://www.openwall.com/lists/oss-security/2026/09/23/31"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2026-09-23T18:10:48.694Z"}}, {"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-2026-86243", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-09-23T15:28:53.132953Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-23T15:29:07.243Z"}}], "cna": {"title": "Apache Tomcat Native: DoS via TLS handshake", "source": {"discovery": "INTERNAL"}, "metrics": [{"other": {"type": "Textual description of severity", "content": {"text": "important"}}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"vendor": "Apache Software Foundation", "product": "Apache Tomcat Native", "versions": [{"status": "affected", "version": "2.0.0", "versionType": "semver", "lessThanOrEqual": "2.0.15"}, {"status": "affected", "version": "1.3.0", "versionType": "semver", "lessThanOrEqual": "1.3.8"}], "defaultStatus": "unaffected"}], "references": [{"url": "https://lists.apache.org/thread/8p4jf02w54m22x0cwpq2x53w3ov8o557", "tags": ["vendor-advisory"]}], "x_generator": {"engine": "Vulnogram 1.0.3"}, "descriptions": [{"lang": "en", "value": "Buffer over-read vulnerability in Apache Tomcat Native during the TLS handshake permits a malicious user to trigger a DoS via a JVM crash.\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. Earlier, unsupported versions may also be affected.\n\n\n\nUsers are recommended to upgrade to version 1.3.9 or 2.0.16, which fix the issue.", "supportingMedia": [{"type": "text/html", "value": "<p>Buffer over-read vulnerability in Apache Tomcat Native during the TLS handshake permits a malicious user to trigger a DoS via a JVM crash.</p><p>This issue affects Apache Tomcat Native: from 2.0.0 through 2.0.15, from 1.3.0 through 1.3.8. Earlier, unsupported versions may also be affected.</p><p>Users are recommended to upgrade to version 1.3.9 or 2.0.16, which fix the issue.</p>", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-126", "description": "CWE-126 Buffer over-read"}]}], "providerMetadata": {"orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "shortName": "apache", "dateUpdated": "2026-09-23T12:24:55.119Z"}}}, "cveMetadata": {"cveId": "CVE-2026-86243", "state": "PUBLISHED", "dateUpdated": "2026-09-23T18:10:48.694Z", "dateReserved": "2026-09-06T09:21:33.313Z", "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "datePublished": "2026-09-23T12:24:55.119Z", "assignerShortName": "apache"}, "dataVersion": "5.2"}

{"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"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:apache:tomcat_native:*:*:*:*:*:*:*:*", "matchCriteriaId": "F73CA9D6-BD48-4223-B2AC-6F345E0895C6", "versionEndExcluding": "1.3.9", "versionStartIncluding": "1.3.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:apache:tomcat_native:*:*:*:*:*:*:*:*", "matchCriteriaId": "AC3D1E2E-A1EE-4F33-8D7F-11D37A8AAE66", "versionEndExcluding": "2.0.16", "versionStartIncluding": "2.0.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Buffer over-read vulnerability in Apache Tomcat Native during the TLS handshake permits a malicious user to trigger a DoS via a JVM crash.\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. Earlier, unsupported versions may also be affected.\n\n\n\nUsers are recommended to upgrade to version 1.3.9 or 2.0.16, which fix the issue."}], "id": "CVE-2026-86243", "lastModified": "2026-10-06T13:53:46.107", "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"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-86243", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-09-23T15:28:53.132953Z", "version": "2.0.3"}}]}, "published": "2026-09-23T13:17:30.993", "references": [{"source": "security@apache.org", "tags": ["Vendor Advisory", "Mailing List"], "url": "https://lists.apache.org/thread/8p4jf02w54m22x0cwpq2x53w3ov8o557"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2026/09/23/31"}], "sourceIdentifier": "security@apache.org", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-126"}], "source": "security@apache.org", "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": "2026-09-23T14:00:05.012490+00:00", "updated": "2026-09-23T18:00:07.950755+00:00", "vendors": ["apache", "apache$PRODUCT$apache_tomcat"]}