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        "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"
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                "dateUpdated": "2026-09-23T11:31:36.328Z"
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            "title": "Apache Tomcat: Regression in fix for CVE-2026-41293 can trigger request header mix-up",
            "problemTypes": [
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                    "descriptions": [
                        {
                            "description": "CWE-444 Inconsistent interpretation of HTTP requests ('HTTP Request/Response smuggling')",
                            "lang": "en",
                            "cweId": "CWE-444",
                            "type": "CWE"
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            "source": {
                "discovery": "EXTERNAL"
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            "affected": [
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                    "vendor": "Apache Software Foundation",
                    "product": "Apache Tomcat",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "11.0.22",
                            "lessThanOrEqual": "11.0.25",
                            "versionType": "semver"
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                        {
                            "status": "affected",
                            "version": "10.1.55",
                            "lessThanOrEqual": "10.1.59",
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                            "version": "9.0.118",
                            "lessThanOrEqual": "9.0.121",
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                    "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.",
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            "references": [
                {
                    "url": "https://lists.apache.org/thread/mss45z99lcdd5dtpgcn45dy82f3toswc",
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                            "value": "GENERAL"
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                    "value": "Jeppe Weikop",
                    "type": "finder"
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                    {
                        "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"
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                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-09-23T16:16:46.410403Z",
                                "id": "CVE-2026-86350",
                                "options": [
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                                        "Exploitation": "none"
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