PT-2026-42827 · Goauthentik · Authentik

Published 2026-05-22 · Updated 2026-05-22 · CVE-2026-40172

Mitre

CVSS v3.1

8.1

High

Base vector

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

authentik is an open-source identity provider. In versions prior to 2025.12.5 and 2026.2.0-rc1 through 2026.2.2, the PATCH /api/v3/core/users/{pk}/ API allows a caller with change user on a target user to assign arbitrary groups through UserSerializer, including groups with is superuser=True, without requiring enable group superuser, leading to privilege escalation. This bypasses the stricter permission model enforced in group-management paths and enables delegated user-management permissions to escalate target users to administrator-equivalent privilege. Users with permissions to update groups or permissions to update users are able to add themselves or other users they have permissions on to users which have superuser permissions. This issue has been fixed in versions 22025.12.5 and 2026.2.3.

Fix

Improper Privilege Management

Weakness Enumeration

CWE-269

Related Identifiers

CVE-2026-40172

Affected Products

Authentik

References · 3

• https://github.com/goauthentik/authentik/releases/tag/version%2F2025.12.5 · Note
• https://github.com/goauthentik/authentik/releases/tag/version%2F2026.2.3 · Note
• https://github.com/goauthentik/authentik/security/advisories/GHSA-h6x7-hjjc-wjc9 · Note