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CVE-2026-40166

UNKNOWN · CVSS N/A EPSS 0.37% Public Exploit

Source: NVD + CISA KEV + EPSS · Published: 2026-05-22 · Last synced: 2026-06-20

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Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

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CVE
CVE-2026-40166
Severity
UNKNOWN
CVSS
N/A
EPSS
0.37%

Original NVD Description

authentik is an open-source identity provider. In versions prior to 2025.12.5 and 2026.2.0-rc1 through 2026.2.2, authenticated non-admin users with at least one OAuth2 access token can retrieve the client_secret of confidential OAuth2 providers they have previously authenticated against, exposing sensitive information to users without the correct permissions. This logic is GET /api/v3/oauth2/access_tokens/. The API response includes a nested provider object containing client_id and client_secret for providers configured with client_type: confidential, which should not be accessible to low-privilege users. This issue has been fixed in versions 2025.12.5 and 2026.2.3.