{"id":"CVE-2026-42498","state":"PUBLISHED","title":"Apache Tomcat: WebSocket authentication header exposure","description":"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.","publishedAt":"2026-05-12T15:17:56.531Z","updatedAt":"2026-05-13T15:59:04.361Z","severity":{"score":7.3,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","source":"CISA-ADP"},"assigner":"apache","products":["Apache Software Foundation Apache Tomcat"],"affected":[{"vendor":"Apache Software Foundation","product":"Apache Tomcat","defaultStatus":"unaffected","versions":[{"version":"11.0.0-M1","status":"affected","lessThanOrEqual":"11.0.21","versionType":"semver"},{"version":"10.1.0-M1","status":"affected","lessThanOrEqual":"10.1.54","versionType":"semver"},{"version":"9.0.2","status":"affected","lessThanOrEqual":"9.0.117","versionType":"semver"},{"version":"8.5.24","status":"affected","lessThanOrEqual":"8.5.100","versionType":"semver"},{"version":"7.0.83","status":"affected","lessThanOrEqual":"7.0.109","versionType":"semver"}]}],"references":["https://lists.apache.org/thread/n61zwf75jrv09rz90j4jssncm244bwdb","http://www.openwall.com/lists/oss-security/2026/05/12/14"],"weaknesses":["CWE-200"],"ingestedAt":"2026-10-29T20:11:57.932Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/42xxx/CVE-2026-42498.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-42498","state":"PUBLISHED","datePublished":"2026-05-12T15:17:56.531Z","dateUpdated":"2026-05-13T15:59:04.361Z","assignerShortName":"apache","assignerOrgId":"f0158376-9dc2-43b6-827c-5f631a4d8d09","dateReserved":"2026-04-27T22:13:05.647Z"},"containers":{"cna":{"title":"Apache Tomcat: WebSocket authentication header exposure","descriptions":[{"lang":"en","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."}],"affected":[{"vendor":"Apache Software Foundation","product":"Apache Tomcat","defaultStatus":"unaffected","versions":[{"version":"11.0.0-M1","status":"affected","lessThanOrEqual":"11.0.21","versionType":"semver"},{"version":"10.1.0-M1","status":"affected","lessThanOrEqual":"10.1.54","versionType":"semver"},{"version":"9.0.2","status":"affected","lessThanOrEqual":"9.0.117","versionType":"semver"},{"version":"8.5.24","status":"affected","lessThanOrEqual":"8.5.100","versionType":"semver"},{"version":"7.0.83","status":"affected","lessThanOrEqual":"7.0.109","versionType":"semver"}]}],"references":[{"url":"https://lists.apache.org/thread/n61zwf75jrv09rz90j4jssncm244bwdb","tags":["vendor-advisory"]}],"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":{"shortName":"apache","orgId":"f0158376-9dc2-43b6-827c-5f631a4d8d09","dateUpdated":"2026-05-12T15:17:56.531Z"},"credits":[{"lang":"en","type":"finder","value":"lokerxx"}],"source":{"discovery":"EXTERNAL"},"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":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2026-05-12T17:40:58.470Z"}},{"title":"CISA ADP Vulnrichment","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"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-05-13T15:59:04.361Z"}}]}}}