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    "cveMetadata": {
        "cveId": "CVE-2026-68569",
        "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
        "state": "PUBLISHED",
        "assignerShortName": "apache",
        "dateReserved": "2026-07-31T07:51:47.785Z",
        "datePublished": "2026-08-25T21:59:17.438Z",
        "dateUpdated": "2026-08-26T02:30:40.822Z"
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                "shortName": "apache",
                "dateUpdated": "2026-08-25T21:59:17.438Z"
            },
            "title": "Apache Tomcat: Principal lookup can fail open in some cases",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "description": "CWE-287 Improper Authentication",
                            "lang": "en",
                            "cweId": "CWE-287",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "source": {
                "discovery": "EXTERNAL"
            },
            "affected": [
                {
                    "vendor": "Apache Software Foundation",
                    "product": "Apache Tomcat",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "11.0.0-M1",
                            "lessThanOrEqual": "11.0.24",
                            "versionType": "semver"
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                        {
                            "status": "affected",
                            "version": "10.1.0-M1",
                            "lessThanOrEqual": "10.1.57",
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                            "status": "affected",
                            "version": "9.0.0.M1",
                            "lessThanOrEqual": "9.0.120",
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                            "lessThanOrEqual": "8.5.100",
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                        {
                            "status": "affected",
                            "version": "7.0.0",
                            "lessThanOrEqual": "70.109",
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                        {
                            "status": "unknown",
                            "version": "0",
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                    "value": "Improper Authentication vulnerability in Apache Tomcat meant that in some circumstances (e.g. CLIENT-CERT, SPNEGO) that a user would be authenticated even if the user did not exist in the DataSourceRealm.\n\n\n\nThis issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.0.M1 through 9.0.120.\n\n\n\n\n\n\n\nThe following versions were EOL at the time the CVE was created but are \nknown to be affected: from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Other unsupported versions may also be affected.\n\n\n\n\n\n\n\nUsers are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121, which fix the issue.",
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                        }
                    ]
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            ],
            "references": [
                {
                    "url": "https://lists.apache.org/thread/8robqo76q0osxgw0b5lcwgz0hcf9h4zc",
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                        "url": "http://www.openwall.com/lists/oss-security/2026/08/26/8"
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