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CVE-2026-68569

Apache Tomcat: Principal lookup can fail open in some cases

cve-program · severity unknownCVSS unknownCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-68569

Published

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. This 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. The following versions were EOL at the time the CVE was created but are known 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. Users are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121, which fix the issue.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-68569

Published

Apache Tomcat

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Apache Software Foundation",
                    "product": "Apache Tomcat",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "11.0.0-M1",
                            "lessThanOrEqual": "11.0.24",
                            "versionType": "semver"
                        },
                        {
                            "status": "affected",
                            "version": "10.1.0-M1",
                            "lessThanOrEqual": "10.1.57",
                            "versionType": "semver"
                        },
                        {
                            "status": "affected",
                            "version": "9.0.0.M1",
                            "lessThanOrEqual": "9.0.120",
                            "versionType": "semver"
                        },
                        {
                            "status": "affected",
                            "version": "8.5.0",
                            "lessThanOrEqual": "8.5.100",
                            "versionType": "semver"
                        },
                        {
                            "status": "affected",
                            "version": "7.0.0",
                            "lessThanOrEqual": "7.0.109",
                            "versionType": "semver"
                        },
                        {
                            "status": "unknown",
                            "version": "0",
                            "lessThan": "7.0.0",
                            "versionType": "semver"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }

Original source record · Cite this exact observation · Complete original publisher JSON