{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-86350","assignerOrgId":"f0158376-9dc2-43b6-827c-5f631a4d8d09","state":"PUBLISHED","assignerShortName":"apache","dateReserved":"2026-09-07T09:49:48.382Z","datePublished":"2026-09-23T11:31:36.328Z","dateUpdated":"2026-09-23T16:17:11.408Z"},"containers":{"cna":{"providerMetadata":{"orgId":"f0158376-9dc2-43b6-827c-5f631a4d8d09","shortName":"apache","dateUpdated":"2026-09-23T11:31:36.328Z"},"title":"Apache Tomcat: Regression in fix for CVE-2026-41293 can trigger request header mix-up","problemTypes":[{"descriptions":[{"description":"CWE-444 Inconsistent interpretation of HTTP requests ('HTTP Request/Response smuggling')","lang":"en","cweId":"CWE-444","type":"CWE"}]}],"source":{"discovery":"EXTERNAL"},"affected":[{"vendor":"Apache Software Foundation","product":"Apache Tomcat","versions":[{"status":"affected","version":"11.0.22","lessThanOrEqual":"11.0.25","versionType":"semver"},{"status":"affected","version":"10.1.55","lessThanOrEqual":"10.1.59","versionType":"semver"},{"status":"affected","version":"9.0.118","lessThanOrEqual":"9.0.121","versionType":"semver"}],"defaultStatus":"unaffected"}],"descriptions":[{"value":"Inconsistent interpretation of HTTP/2 requests ('HTTP Request/Response smuggling') vulnerability in Apache Tomcat caused by a regression in fix for CVE-2026-41293 can trigger request header mix-up.\n\n\n\nThis issue affects Apache Tomcat: from 11.0.22 through 11.0.25, from 10.1.55 through 10.1.59, from 9.0.118 through 9.0.121.\n\n\n\nUsers are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.","lang":"en","supportingMedia":[{"type":"text/html","base64":false,"value":"<p>Inconsistent interpretation of HTTP/2 requests ('HTTP Request/Response smuggling') vulnerability in Apache Tomcat caused by a&nbsp;regression in fix for CVE-2026-41293 can trigger request header mix-up.</p><p>This issue affects Apache Tomcat: from 11.0.22 through 11.0.25, from 10.1.55 through 10.1.59, from 9.0.118 through 9.0.121.</p><p>Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.</p>"}]}],"references":[{"url":"https://lists.apache.org/thread/mss45z99lcdd5dtpgcn45dy82f3toswc","tags":["vendor-advisory"]}],"metrics":[{"other":{"type":"Textual description of severity","content":{"text":"important"}},"scenarios":[{"lang":"en","value":"GENERAL"}]}],"credits":[{"lang":"en","value":"Jeppe Weikop","type":"finder"}],"x_generator":{"engine":"Vulnogram 1.0.3"}},"adp":[{"metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":9.1,"attackVector":"NETWORK","baseSeverity":"CRITICAL","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","integrityImpact":"HIGH","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"NONE","privilegesRequired":"NONE","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-09-23T16:16:46.410403Z","id":"CVE-2026-86350","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"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":"2026-09-23T16:17:11.408Z"}}]}}