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CVE-2026-55106— authentik: Unauthenticated LDAP directory data disclosure

Quick assessment

Affected
goauthentik authentik
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Authentik Security authentik是Authentik Security组织的一个用于现代 SSO 的开源身份提供商 (IdP)。 Authentik Security authentik 2026.2.6之前版本和2026.5.0至2026.5.5之前版本存在授权问题漏洞，该漏洞源于LDAP Source API的诊断操作未强制执行对象级读取授权过滤器，可能导致未经身份验证的客户端调用诊断操作，泄露目录结构、命名约定及特定账户和组的存在信息。

CVSS 5.3 · Medium EPSS 0.25% · P16

Affected Version Matrix 2

VendorProduct Version RangeStatus
goauthentik authentik < 2026.2.6 affected
>= 2026.5.0, < 2026.5.5 affected
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I. Basic Information for CVE-2026-55106

Vulnerability Information
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Vulnerability Title
authentik: Unauthenticated LDAP directory data disclosure
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
Authentik Security authentik 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Authentik Security authentik是Authentik Security组织的一个用于现代 SSO 的开源身份提供商 (IdP)。 Authentik Security authentik 2026.2.6之前版本和2026.5.0至2026.5.5之前版本存在授权问题漏洞，该漏洞源于LDAP Source API的诊断操作未强制执行对象级读取授权过滤器，可能导致未经身份验证的客户端调用诊断操作，泄露目录结构、命名约定及特定账户和组的存在信息。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
goauthentik authentik < 2026.2.6 -

II. Public POCs for CVE-2026-55106

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III. Intelligence Information for CVE-2026-55106

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Patches & Fixes for CVE-2026-55106 (4)

Vendor Advisories for CVE-2026-55106 (1)

Vendor Pages for CVE-2026-55106 (2)

Same Patch Batch · goauthentik · 2026-08-18 · 4 CVEs total

CVE-2026-57580 9.4 CRITICAL authentik: Account Takeover via SAML NameID Comment Truncation
CVE-2026-61574 8.8 HIGH authentik RAC: access any endpoint via an unrelated application
CVE-2026-54730 8.6 HIGH authentik: Authentication Flow Bypass via Unguarded challenge_valid() in AuthenticatorEndp

IV. Related Vulnerabilities

Same product: authentik
Same vendor: goauthentik
Same weakness: CWE-862

V. Comments for CVE-2026-55106

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