CVE-2026-23906

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-23906", "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "state": "PUBLISHED", "assignerShortName": "apache", "dateReserved": "2026-01-19T08:57:10.063Z", "datePublished": "2026-02-10T09:28:09.007Z", "dateUpdated": "2026-02-12T04:45:28.979Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "packageName": "org.apache.druid.extensions:druid-basic-security", "product": "Apache Druid", "vendor": "Apache Software Foundation", "versions": [{"lessThan": "36.0.0", "status": "affected", "version": "0.17.0", "versionType": "semver"}]}], "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<b>Affected Products and Versions</b><br><ul><li>Apache Druid</li><li>Affected Versions: 0.17.0 through 35.x (all versions prior to 36.0.0)</li><li>Prerequisites:<ul><li>druid-basic-security extension enabled</li><li>LDAP authenticator configured</li><li>Underlying LDAP server permits anonymous bind&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;</li></ul></li></ul><br><b>Vulnerability Description</b><br><br>An authentication bypass vulnerability exists in Apache Druid when using the druid-basic-security extension with LDAP authentication. If the underlying LDAP server is configured to allow anonymous<br>binds, an attacker can bypass authentication by providing an existing username with an empty password. This allows unauthorized access to otherwise restricted Druid resources without valid credentials.<br><br>The vulnerability stems from improper validation of LDAP authentication responses when anonymous binds are permitted, effectively treating anonymous bind success as valid user authentication. <br><br><b>Impact</b><br><br>A remote, unauthenticated attacker can:<br><ul><li>Gain unauthorized access to the Apache Druid cluster</li><li>Access sensitive data stored in Druid datasources</li><li>Execute queries and potentially manipulate data</li><li>Access administrative interfaces if the bypassed account has elevated privileges</li><li>Completely compromise the confidentiality, integrity, and availability of the Druid deployment&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;</li></ul><b>Mitigation</b><br>&nbsp;<br>Immediate Mitigation (No Druid Upgrade Required): &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <br><ul><li>Disable anonymous bind on your LDAP server. This prevents the vulnerability from being exploitable and is the recommended immediate action.</li></ul><br><b>Resolution<br></b><ul><li>Upgrade Apache Druid to version 36.0.0 or later, which includes fixes to properly reject anonymous LDAP bind attempts.</li></ul>"}], "value": "Affected Products and Versions\n * Apache Druid\n * Affected Versions: 0.17.0 through 35.x (all versions prior to 36.0.0)\n * Prerequisites: * druid-basic-security extension enabled\n * LDAP authenticator configured\n * Underlying LDAP server permits anonymous bind\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\n\n\n\n\n\n\nVulnerability Description\n\nAn authentication bypass vulnerability exists in Apache Druid when using the druid-basic-security extension with LDAP authentication. If the underlying LDAP server is configured to allow anonymous\nbinds, an attacker can bypass authentication by providing an existing username with an empty password. This allows unauthorized access to otherwise restricted Druid resources without valid credentials.\n\nThe vulnerability stems from improper validation of LDAP authentication responses when anonymous binds are permitted, effectively treating anonymous bind success as valid user authentication. \n\nImpact\n\nA remote, unauthenticated attacker can:\n * Gain unauthorized access to the Apache Druid cluster\n * Access sensitive data stored in Druid datasources\n * Execute queries and potentially manipulate data\n * Access administrative interfaces if the bypassed account has elevated privileges\n * Completely compromise the confidentiality, integrity, and availability of the Druid deployment\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0\n\n\nMitigation\n\u00a0\nImmediate Mitigation (No Druid Upgrade Required): \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \n * Disable anonymous bind on your LDAP server. This prevents the vulnerability from being exploitable and is the recommended immediate action.\n\n\n\nResolution\n * Upgrade Apache Druid to version 36.0.0 or later, which includes fixes to properly reject anonymous LDAP bind attempts."}], "metrics": [{"other": {"content": {"text": "important"}, "type": "Textual description of severity"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-287", "description": "CWE-287 Improper Authentication", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "shortName": "apache", "dateUpdated": "2026-02-10T09:28:09.007Z"}, "references": [{"tags": ["vendor-advisory"], "url": "https://lists.apache.org/thread/2x9rv3kv6t1p577lvq4z0rl0zlt9g4sr"}], "source": {"discovery": "INTERNAL"}, "title": "Apache Druid: Authentication Bypass via LDAP Anonymous Bind", "x_generator": {"engine": "Vulnogram 0.2.0"}}, "adp": [{"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2026-02-10T15:40:50.988837Z", "id": "CVE-2026-23906", "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": "2026-02-10T15:42:54.258Z"}}, {"title": "CVE Program Container", "references": [{"url": "http://www.openwall.com/lists/oss-security/2026/02/09/5"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2026-02-12T04:45:28.979Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CVE Program Container", "references": [{"url": "http://www.openwall.com/lists/oss-security/2026/02/09/5"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2026-02-12T04:45:28.979Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2026-23906", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-02-10T15:40:50.988837Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-02-10T15:40:21.383Z"}}], "cna": {"title": "Apache Druid: Authentication Bypass via LDAP Anonymous Bind", "source": {"discovery": "INTERNAL"}, "metrics": [{"other": {"type": "Textual description of severity", "content": {"text": "important"}}}], "affected": [{"vendor": "Apache Software Foundation", "product": "Apache Druid", "versions": [{"status": "affected", "version": "0.17.0", "lessThan": "36.0.0", "versionType": "semver"}], "packageName": "org.apache.druid.extensions:druid-basic-security", "defaultStatus": "unaffected"}], "references": [{"url": "https://lists.apache.org/thread/2x9rv3kv6t1p577lvq4z0rl0zlt9g4sr", "tags": ["vendor-advisory"]}], "x_generator": {"engine": "Vulnogram 0.2.0"}, "descriptions": [{"lang": "en", "value": "Affected Products and Versions\n * Apache Druid\n * Affected Versions: 0.17.0 through 35.x (all versions prior to 36.0.0)\n * Prerequisites: * druid-basic-security extension enabled\n * LDAP authenticator configured\n * Underlying LDAP server permits anonymous bind\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\n\n\n\n\n\n\nVulnerability Description\n\nAn authentication bypass vulnerability exists in Apache Druid when using the druid-basic-security extension with LDAP authentication. If the underlying LDAP server is configured to allow anonymous\nbinds, an attacker can bypass authentication by providing an existing username with an empty password. This allows unauthorized access to otherwise restricted Druid resources without valid credentials.\n\nThe vulnerability stems from improper validation of LDAP authentication responses when anonymous binds are permitted, effectively treating anonymous bind success as valid user authentication. \n\nImpact\n\nA remote, unauthenticated attacker can:\n * Gain unauthorized access to the Apache Druid cluster\n * Access sensitive data stored in Druid datasources\n * Execute queries and potentially manipulate data\n * Access administrative interfaces if the bypassed account has elevated privileges\n * Completely compromise the confidentiality, integrity, and availability of the Druid deployment\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0\n\n\nMitigation\n\u00a0\nImmediate Mitigation (No Druid Upgrade Required): \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \n * Disable anonymous bind on your LDAP server. This prevents the vulnerability from being exploitable and is the recommended immediate action.\n\n\n\nResolution\n * Upgrade Apache Druid to version 36.0.0 or later, which includes fixes to properly reject anonymous LDAP bind attempts.", "supportingMedia": [{"type": "text/html", "value": "<b>Affected Products and Versions</b><br><ul><li>Apache Druid</li><li>Affected Versions: 0.17.0 through 35.x (all versions prior to 36.0.0)</li><li>Prerequisites:<ul><li>druid-basic-security extension enabled</li><li>LDAP authenticator configured</li><li>Underlying LDAP server permits anonymous bind&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;</li></ul></li></ul><br><b>Vulnerability Description</b><br><br>An authentication bypass vulnerability exists in Apache Druid when using the druid-basic-security extension with LDAP authentication. If the underlying LDAP server is configured to allow anonymous<br>binds, an attacker can bypass authentication by providing an existing username with an empty password. This allows unauthorized access to otherwise restricted Druid resources without valid credentials.<br><br>The vulnerability stems from improper validation of LDAP authentication responses when anonymous binds are permitted, effectively treating anonymous bind success as valid user authentication. <br><br><b>Impact</b><br><br>A remote, unauthenticated attacker can:<br><ul><li>Gain unauthorized access to the Apache Druid cluster</li><li>Access sensitive data stored in Druid datasources</li><li>Execute queries and potentially manipulate data</li><li>Access administrative interfaces if the bypassed account has elevated privileges</li><li>Completely compromise the confidentiality, integrity, and availability of the Druid deployment&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;</li></ul><b>Mitigation</b><br>&nbsp;<br>Immediate Mitigation (No Druid Upgrade Required): &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <br><ul><li>Disable anonymous bind on your LDAP server. This prevents the vulnerability from being exploitable and is the recommended immediate action.</li></ul><br><b>Resolution<br></b><ul><li>Upgrade Apache Druid to version 36.0.0 or later, which includes fixes to properly reject anonymous LDAP bind attempts.</li></ul>", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-287", "description": "CWE-287 Improper Authentication"}]}], "providerMetadata": {"orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "shortName": "apache", "dateUpdated": "2026-02-10T09:28:09.007Z"}}}, "cveMetadata": {"cveId": "CVE-2026-23906", "state": "PUBLISHED", "dateUpdated": "2026-02-12T04:45:28.979Z", "dateReserved": "2026-01-19T08:57:10.063Z", "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "datePublished": "2026-02-10T09:28:09.007Z", "assignerShortName": "apache"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "packageName": "org.apache.druid.extensions:druid-basic-security", "product": "Apache Druid", "vendor": "Apache Software Foundation", "versions": [{"lessThan": "36.0.0", "status": "affected", "version": "0.17.0", "versionType": "semver"}]}], "source": "security@apache.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:apache:druid:*:*:*:*:*:*:*:*", "matchCriteriaId": "1EAD572D-067D-4CCC-9C8E-B4439C08B80D", "versionEndExcluding": "36.0.0", "versionStartIncluding": "0.17.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Affected Products and Versions\n * Apache Druid\n * Affected Versions: 0.17.0 through 35.x (all versions prior to 36.0.0)\n * Prerequisites: * druid-basic-security extension enabled\n * LDAP authenticator configured\n * Underlying LDAP server permits anonymous bind\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\n\n\n\n\n\n\nVulnerability Description\n\nAn authentication bypass vulnerability exists in Apache Druid when using the druid-basic-security extension with LDAP authentication. If the underlying LDAP server is configured to allow anonymous\nbinds, an attacker can bypass authentication by providing an existing username with an empty password. This allows unauthorized access to otherwise restricted Druid resources without valid credentials.\n\nThe vulnerability stems from improper validation of LDAP authentication responses when anonymous binds are permitted, effectively treating anonymous bind success as valid user authentication. \n\nImpact\n\nA remote, unauthenticated attacker can:\n * Gain unauthorized access to the Apache Druid cluster\n * Access sensitive data stored in Druid datasources\n * Execute queries and potentially manipulate data\n * Access administrative interfaces if the bypassed account has elevated privileges\n * Completely compromise the confidentiality, integrity, and availability of the Druid deployment\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0\n\n\nMitigation\n\u00a0\nImmediate Mitigation (No Druid Upgrade Required): \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \n * Disable anonymous bind on your LDAP server. This prevents the vulnerability from being exploitable and is the recommended immediate action.\n\n\n\nResolution\n * Upgrade Apache Druid to version 36.0.0 or later, which includes fixes to properly reject anonymous LDAP bind attempts."}, {"lang": "es", "value": "Productos y Versiones Afectados\n * Apache Druid\n * Versiones Afectadas: 0.17.0 hasta 35.x (todas las versiones anteriores a 36.0.0)\n * Prerrequisitos:\n * extensi\u00f3n druid-basic-security habilitada\n * autenticador LDAP configurado\n * El servidor LDAP subyacente permite el enlace an\u00f3nimo\n\nDescripci\u00f3n de la vulnerabilidad\n\nExiste una vulnerabilidad de omisi\u00f3n de autenticaci\u00f3n en Apache Druid al usar la extensi\u00f3n druid-basic-security con autenticaci\u00f3n LDAP. Si el servidor LDAP subyacente est\u00e1 configurado para permitir enlaces an\u00f3nimos, un atacante puede omitir la autenticaci\u00f3n proporcionando un nombre de usuario existente con una contrase\u00f1a vac\u00eda. Esto permite el acceso no autorizado a recursos de Druid que de otro modo estar\u00edan restringidos sin credenciales v\u00e1lidas.\n\nLa vulnerabilidad se deriva de una validaci\u00f3n incorrecta de las respuestas de autenticaci\u00f3n LDAP cuando se permiten los enlaces an\u00f3nimos, tratando efectivamente el \u00e9xito del enlace an\u00f3nimo como una autenticaci\u00f3n de usuario v\u00e1lida.\n\nImpacto\n\nUn atacante remoto no autenticado puede:\n * Obtener acceso no autorizado al cl\u00faster de Apache Druid\n * Acceder a datos sensibles almacenados en las fuentes de datos de Druid\n * Ejecutar consultas y potencialmente manipular datos\n * Acceder a interfaces administrativas si la cuenta omitida tiene privilegios elevados\n * Comprometer completamente la confidencialidad, integridad y disponibilidad de la implementaci\u00f3n de Druid\n\nMitigaci\u00f3n\n\nMitigaci\u00f3n Inmediata (No se requiere actualizaci\u00f3n de Druid):\n * Deshabilite el enlace an\u00f3nimo en su servidor LDAP. Esto evita que la vulnerabilidad sea explotable y es la acci\u00f3n inmediata recomendada.\n\nResoluci\u00f3n\n * Actualice Apache Druid a la versi\u00f3n 36.0.0 o posterior, que incluye correcciones para rechazar correctamente los intentos de enlace an\u00f3nimo de LDAP."}], "id": "CVE-2026-23906", "lastModified": "2026-06-17T10:22:17.367", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "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:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-23906", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-02-10T15:40:50.988837Z", "version": "2.0.3"}}]}, "published": "2026-02-10T10:15:59.427", "references": [{"source": "security@apache.org", "tags": ["Mailing List", "Vendor Advisory"], "url": "https://lists.apache.org/thread/2x9rv3kv6t1p577lvq4z0rl0zlt9g4sr"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.openwall.com/lists/oss-security/2026/02/09/5"}], "sourceIdentifier": "security@apache.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-287"}], "source": "security@apache.org", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0.17.0,36.0.0)"}}], "product": "druid", "vendor": "apache"}], "analysis": {"en": {"generated_at": "2026-04-18T12:51:47.087243+00:00", "value": {"mitigation_remediation": ["Upgrade Apache Druid to version 36.0.0 or later, which eliminates the flaw by rejecting anonymous LDAP bind attempts", "Disable anonymous bind on your LDAP server to prevent the vulnerability from being exploitable", "Reconfigure the druid-basic-security extension and LDAP settings to disallow anonymous binds and enforce proper authentication"], "summary": {"action": "Patch", "impact": "Authentication Bypass"}, "threat_synthesis": {"affected_systems": "Affected systems include Apache Druid releases from version 0.17.0 through 35.x, all of which lack the proper rejection of anonymous LDAP bind attempts. The vulnerability is only present when the druid-basic-security extension is enabled, an LDAP authenticator is configured, and the LDAP server accepts anonymous binds.", "description_and_impact": "The vulnerability in Apache Druid arises when the druid-basic-security extension is used with LDAP authentication and the underlying LDAP server permits anonymous binds. The LDAP authenticator incorrectly validates authentication responses, treating a successful anonymous bind as a valid user authentication. This flaw allows a remote, unauthenticated attacker to supply any existing username with an empty password and gain authenticated access to the Druid cluster, thereby enabling unauthorized read, query, or administrative actions on data stored in Druid datasources.", "risk_and_exploitability": "The CVSS score of 9.8 reflects a high\u2011impact remote exploitation scenario. Although the EPSS score is below 1%, indicating a low current exploitation probability, the issue is not listed in the CISA KEV catalog. The attack vector is remote; an attacker must be able to reach the Druid service and trigger the LDAP authentication workflow. By exploiting the permissive anonymous bind, the attacker can bypass authentication and attain full access to the cluster without valid credentials."}}}}, "created": "2026-02-10T11:34:22.160763+00:00", "updated": "2026-04-18T13:00:08.739251+00:00", "vendors": ["apache", "apache$PRODUCT$druid"]}