{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-42498","assignerOrgId":"f0158376-9dc2-43b6-827c-5f631a4d8d09","state":"PUBLISHED","assignerShortName":"apache","dateReserved":"2026-04-27T22:13:05.647Z","datePublished":"2026-05-12T15:17:56.531Z","dateUpdated":"2026-05-13T15:59:04.361Z"},"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Apache Tomcat","vendor":"Apache Software Foundation","versions":[{"lessThanOrEqual":"11.0.21","status":"affected","version":"11.0.0-M1","versionType":"semver"},{"lessThanOrEqual":"10.1.54","status":"affected","version":"10.1.0-M1","versionType":"semver"},{"lessThanOrEqual":"9.0.117","status":"affected","version":"9.0.2","versionType":"semver"},{"lessThanOrEqual":"8.5.100","status":"affected","version":"8.5.24","versionType":"semver"},{"lessThanOrEqual":"7.0.109","status":"affected","version":"7.0.83","versionType":"semver"}]}],"credits":[{"lang":"en","type":"finder","value":"lokerxx"}],"descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"<p>Exposure of HTTP Authentication Header to unexpected hosts during WebSocket authentication vulnerability in Apache Tomcat.</p><p>This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.2 through 9.0.117, from 8.5.24 through 8.5.100, from 7.0.83 through 7.0.109.</p><p>Users are recommended to upgrade to version 11.0.22, 10.1.55 or 9.0.118, which fix the issue.</p>"}],"value":"Exposure of HTTP Authentication Header to unexpected hosts during WebSocket authentication vulnerability in Apache Tomcat.\n\nThis issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.2 through 9.0.117, from 8.5.24 through 8.5.100, from 7.0.83 through 7.0.109.\n\nUsers are recommended to upgrade to version 11.0.22, 10.1.55 or 9.0.118, which fix the issue."}],"metrics":[{"other":{"content":{"text":"low"},"type":"Textual description of severity"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-200","description":"CWE-200 Exposure of HTTP Authentication Header to unexpected hosts","lang":"en","type":"CWE"}]}],"providerMetadata":{"orgId":"f0158376-9dc2-43b6-827c-5f631a4d8d09","shortName":"apache","dateUpdated":"2026-05-12T15:17:56.531Z"},"references":[{"tags":["vendor-advisory"],"url":"https://lists.apache.org/thread/n61zwf75jrv09rz90j4jssncm244bwdb"}],"source":{"discovery":"EXTERNAL"},"title":"Apache Tomcat: WebSocket authentication header exposure","x_generator":{"engine":"Vulnogram 0.2.0"}},"adp":[{"title":"CVE Program Container","references":[{"url":"http://www.openwall.com/lists/oss-security/2026/05/12/14"}],"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2026-05-12T17:40:58.470Z"}},{"metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":7.3,"attackVector":"NETWORK","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","integrityImpact":"LOW","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"LOW","privilegesRequired":"NONE","confidentialityImpact":"LOW"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-05-13T15:58:45.406125Z","id":"CVE-2026-42498","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":"2026-05-13T15:59:04.361Z"}}]}}