{"affected":[{"affectedData":[{"defaultStatus":"unaffected","product":"Apache Tomcat","vendor":"Apache Software Foundation","versions":[{"lessThanOrEqual":"11.0.25","status":"affected","version":"11.0.22","versionType":"semver"},{"lessThanOrEqual":"10.1.59","status":"affected","version":"10.1.55","versionType":"semver"},{"lessThanOrEqual":"9.0.121","status":"affected","version":"9.0.118","versionType":"semver"}]}],"source":"security@apache.org"}],"cveTags":[],"descriptions":[{"lang":"en","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."}],"id":"CVE-2026-86350","lastModified":"2026-09-23T17:58:26.570","metrics":{"cvssMetricV31":[{"cvssData":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":9.1,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","version":"3.1"},"exploitabilityScore":3.9,"impactScore":5.2,"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","type":"Secondary"}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"id":"CVE-2026-86350","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"total"}],"role":"CISA Coordinator","timestamp":"2026-09-23T16:16:46.410403Z","version":"2.0.3"}}]},"published":"2026-09-23T12:17:08.350","references":[{"source":"security@apache.org","url":"https://lists.apache.org/thread/mss45z99lcdd5dtpgcn45dy82f3toswc"}],"sourceIdentifier":"security@apache.org","vulnStatus":"Awaiting Analysis","weaknesses":[{"description":[{"lang":"en","value":"CWE-444"}],"source":"security@apache.org","type":"Secondary"}]}