CVE-2026-23906
Apache Druid: Authentication Bypass via LDAP Anonymous Bind
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Apache Druid: Authentication Bypass via LDAP Anonymous Bind
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.
- Record
CVE-2026-23906- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-287
- Updated
- 2026-11-02
EUVDEUVD-2026-6219
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.
- Record
EUVD-2026-6219- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-q672-hfc7-g833
Apache Druid Vulnerable to Authentication Bypass
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.
- Record
GHSA-q672-hfc7-g833- CVSS 4.0
- 9.3 Critical
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N - Weakness
- CWE-287
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2026-23906- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-287
- Updated
- 2026-11-02
OSV
Apache Druid: Authentication Bypass via LDAP Anonymous Bind
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.
- Record
CVE-2026-23906- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-287
- Updated
- 2026-11-02
OSVGHSA-q672-hfc7-g833
Apache Druid Vulnerable to Authentication Bypass
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.
- Record
GHSA-q672-hfc7-g833- CVSS 4.0
- 9.3 Critical
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N - Weakness
- CWE-287
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
org.apache.druid.extensions:druid-basic-securityMaven |
0.17.0 up to 36.0.0 | 36.0.0 |
org.apache.druid.extensions:druid-basic-securityMaven |
0.17.0 up to 36.0.0, plus listed versions 0.17.10.18.00.18.10.19.00.20.0 Show 28 moreShow less0.20.10.20.20.21.00.21.10.22.00.22.10.23.024.0.024.0.124.0.225.0.026.0.027.0.028.0.028.0.129.0.029.0.130.0.030.0.131.0.031.0.131.0.232.0.032.0.133.0.034.0.035.0.035.0.1 |
36.0.0 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-23906 is a critical vulnerability (CVSS 9.8) in Apache Druid, published February 10, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.07%, the 64th percentile. Fixed in org.apache.druid.extensions:druid-basic-security 36.0.0.