---
id: CVE-2026-55106
title: authentik is an open-source identity provider
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
  th…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'
cwe:
  - CWE-862
published: '2026-08-18'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T21:02:26.047'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-55106'
references:
  - url: >-
      https://github.com/goauthentik/authentik/commit/e638de23217480854ec5e48ca6fceae479321f99
    label: security-advisories@github.com
  - url: >-
      https://github.com/goauthentik/authentik/commit/fc336da4bd32bef52800c77d91aa0b82c5533041
    label: security-advisories@github.com
  - url: 'https://github.com/goauthentik/authentik/pull/24055'
    label: security-advisories@github.com
  - url: 'https://github.com/goauthentik/authentik/pull/24060'
    label: security-advisories@github.com
  - url: 'https://github.com/goauthentik/authentik/releases/tag/version/2026.2.6'
    label: security-advisories@github.com
  - url: 'https://github.com/goauthentik/authentik/releases/tag/version/2026.5.5'
    label: security-advisories@github.com
  - url: >-
      https://github.com/goauthentik/authentik/security/advisories/GHSA-h8ff-c3h7-2gf8
    label: security-advisories@github.com
tags:
  - nvd
epss: 0.00437
epssPercentile: 0.35407
ingestedAt: '2026-09-08T21:11:12.282Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.