CVE-2026-55106 (GCVE-0-2026-55106)

Vulnerability from cvelistv5 – Published: 2026-08-18 16:59 – Updated: 2026-08-18 19:07
VLAI
Title
authentik: Unauthenticated LDAP directory data disclosure
Summary
authentik is an open-source identity provider. Prior to 2026.2.6 and 2026.5.5, a diagnostic action on the LDAP Source API does not enforce the object-level read-authorization filter used by the rest of the API. Any party able to reach the API, including an unauthenticated client, can invoke the diagnostic action against a configured LDAP Source. The server then connects to the upstream directory using the source's configured bind credentials and returns a bounded set of directory entries. The response exposes the distinguished names of those entries and the names of the attributes present on them, revealing directory structure, naming conventions, and the existence of specific accounts and groups, but not attribute values. Deployments without a configured LDAP Source are not affected. This issue is fixed in versions 2026.2.6 and 2026.5.5.
Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-18 19:07 UTC
CWE
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7774 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
goauthentik authentik Affected: < 2026.2.6
Affected: >= 2026.5.0, < 2026.5.5
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

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