DNS
CVE-2026-23906
CRITICAL
GHSA-q672-hfc7-g833
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
3Blast Radius
ecosystem impact- 1 maven packages depend on org.apache.druid.extensions:druid-basic-security (1 direct, 0 indirect)
Ecosystem-wide dependent count for version 0.17.0.
DescriptionCVE.org
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.
AnalysisAI
Authentication bypass in Apache Druid versions 0.17.0 through 35.x. Affects all versions prior to 36.0.0 when specific prerequisites are met.
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | druid-basic-security extension must be enabled with LDAP authenticator configured, and the underlying LDAP server must permit anonymous bind operations. Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 9.8. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Attacker bypasses Druid authentication to execute analytics queries, accessing sensitive business data. |
| Remediation | Update to Apache Druid 36.0.0. Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Inventory all Druid instances and confirm which have druid-basic-security and LDAP authenticator enabled; isolate affected systems from production networks if possible. …
Sign in for detailed remediation steps and compensating controls.
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External POC / Exploit Code
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