authentik: Unauthenticated LDAP directory data disclosure

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-55106
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-18 17:16:59 UTC
Updated2026-08-18 20:17:18 UTC
Descriptionauthentik 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.

Risk And Classification

Primary CVSS: v3.1 5.3 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Problem Types: CWE-862 | CWE-862 CWE-862: Missing Authorization

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
3.1CNADECLARED5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Goauthentik Authentik affected < 2026.2.6 Not specified
CNA Goauthentik Authentik affected >= 2026.5.0, < 2026.5.5 Not specified

References

ReferenceSourceLinkTags
github.com/goauthentik/authentik/security/advisories/GHSA-h8ff-c3h7-2gf8 [email protected] github.com
github.com/goauthentik/authentik/releases/tag/version/2026.5.5 [email protected] github.com
github.com/goauthentik/authentik/pull/24055 [email protected] github.com
github.com/goauthentik/authentik/commit/fc336da4bd32bef52800c77d91aa0b82... [email protected] github.com
github.com/goauthentik/authentik/commit/e638de23217480854ec5e48ca6fceae4... [email protected] github.com
github.com/goauthentik/authentik/pull/24060 [email protected] github.com
github.com/goauthentik/authentik/releases/tag/version/2026.2.6 [email protected] github.com
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