CVE-2026-55106: CWE-862: Missing Authorization in goauthentik authentik
authentik versions prior to 2026.2.6 and 2026.5.5 contain a missing authorization vulnerability in the LDAP Source API's diagnostic action. This flaw allows any client able to reach the API, including unauthenticated users, to invoke a diagnostic action that reveals directory structure information such as distinguished names and attribute names. Attribute values are not exposed. Deployments without a configured LDAP Source are not affected. The issue is fixed in versions 2026.2.6 and 2026.5.5.
AI Analysis
Technical Summary
CVE-2026-55106 is a missing authorization vulnerability (CWE-862) in the open-source identity provider authentik. Specifically, the LDAP Source API's diagnostic action prior to versions 2026.2.6 and 2026.5.5 does not enforce object-level read-authorization filters. This allows any party with network access to the API, including unauthenticated clients, to invoke the diagnostic action against a configured LDAP Source. The server uses the source's bind credentials to query the upstream directory and returns a limited set of directory entries, exposing distinguished names and attribute names but not attribute values. This information disclosure can reveal directory structure, naming conventions, and the existence of accounts and groups. Deployments without LDAP Source configuration are unaffected. The vulnerability is addressed in versions 2026.2.6 and 2026.5.5.
Potential Impact
The vulnerability exposes directory structure information including distinguished names and attribute names to unauthenticated remote attackers. This information disclosure can aid attackers in reconnaissance by revealing naming conventions and the existence of specific accounts and groups. However, attribute values are not disclosed, limiting the sensitivity of the leaked information. There is no impact on data integrity or availability. Deployments without a configured LDAP Source are not affected.
Mitigation Recommendations
This issue is fixed in authentik versions 2026.2.6 and 2026.5.5. Users should upgrade to at least these versions to remediate the vulnerability. No additional mitigation steps are indicated or required if the system is updated. Deployments without a configured LDAP Source are not affected.
CVE-2026-55106: CWE-862: Missing Authorization in goauthentik authentik
Description
authentik versions prior to 2026.2.6 and 2026.5.5 contain a missing authorization vulnerability in the LDAP Source API's diagnostic action. This flaw allows any client able to reach the API, including unauthenticated users, to invoke a diagnostic action that reveals directory structure information such as distinguished names and attribute names. Attribute values are not exposed. Deployments without a configured LDAP Source are not affected. The issue is fixed in versions 2026.2.6 and 2026.5.5.
CVSS v3.1
Score 5.3medium
Affected software
pkg:github/goauthentik/authentikRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-55106 is a missing authorization vulnerability (CWE-862) in the open-source identity provider authentik. Specifically, the LDAP Source API's diagnostic action prior to versions 2026.2.6 and 2026.5.5 does not enforce object-level read-authorization filters. This allows any party with network access to the API, including unauthenticated clients, to invoke the diagnostic action against a configured LDAP Source. The server uses the source's bind credentials to query the upstream directory and returns a limited set of directory entries, exposing distinguished names and attribute names but not attribute values. This information disclosure can reveal directory structure, naming conventions, and the existence of accounts and groups. Deployments without LDAP Source configuration are unaffected. The vulnerability is addressed in versions 2026.2.6 and 2026.5.5.
Potential Impact
The vulnerability exposes directory structure information including distinguished names and attribute names to unauthenticated remote attackers. This information disclosure can aid attackers in reconnaissance by revealing naming conventions and the existence of specific accounts and groups. However, attribute values are not disclosed, limiting the sensitivity of the leaked information. There is no impact on data integrity or availability. Deployments without a configured LDAP Source are not affected.
Mitigation Recommendations
This issue is fixed in authentik versions 2026.2.6 and 2026.5.5. Users should upgrade to at least these versions to remediate the vulnerability. No additional mitigation steps are indicated or required if the system is updated. Deployments without a configured LDAP Source are not affected.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-06-16T14:41:54.579Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a84946ac6e8be033285711a
Added to database: 08/18/2026, 17:20:42 UTC
Last enriched: 08/18/2026, 17:35:20 UTC
Last updated: 08/18/2026, 17:35:20 UTC
Views: 5
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