CVE-2026-23906

The record

Affected Products and Versions * Apache Druid * Affected Versions: 0.17.0 through 35.x (all versions prior to 36.0.0) * Prerequisites: * druid-basic-security extension enabled * LDAP authenticator configured * Underlying LDAP server permits anonymous bind                                                                                                                                                    Vulnerability Description 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 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. The vulnerability stems from improper validation of LDAP authentication responses when anonymous binds are permitted, effectively treating anonymous bind success as valid user authentication. Impact A remote, unauthenticated attacker can: * Gain unauthorized access to the Apache Druid cluster * Access sensitive data stored in Druid datasources * Execute queries and potentially manipulate data * Access administrative interfaces if the bypassed account has elevated privileges * Completely compromise the confidentiality, integrity, and availability of the Druid deployment                                                                                                                                                                                     Mitigation   Immediate Mitigation (No Druid Upgrade Required):                                                                                                                                                   * Disable anonymous bind on your LDAP server. This prevents the vulnerability from being exploitable and is the recommended immediate action. Resolution * Upgrade Apache Druid to version 36.0.0 or later, which includes fixes to properly reject anonymous LDAP bind attempts.

Affected packages

Related vulnerabilities

• GHSA-q672-hfc7-g833 Apache Druid Vulnerable to Authentication Bypass Same vulnerability
• CVE-2026-114638 Traefik v3.7.0 before v3.7.14 contains an improper authentication vulnerability in the… CWE-287
• CVE-2026-114639 Traefik 2.11.0 before 2.11.58 and 3.0.0 before 3.7.14 contains an authentication bypass… CWE-287
• CVE-2026-112104 A flaw has been found in eremef bandcamp-player up to 1.8.33-beta. CWE-287
• CVE-2026-107228 The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP… CWE-287
• CVE-2026-86781 The SSL Zen — SSL Certificate Installer & HTTPS Redirects WordPress plugin before 4.7.40… CWE-287
• CVE-2026-14563 The advanced-customized-prompts WordPress plugin through 1.0.1 does not verify the… CWE-287
• CVE-2026-14559 The teddy-bear-customize-addon WordPress plugin through 1.0.5 does not verify a user's… CWE-287