Zitadel up to 3.4.8/4.12.2 API V2 Endpoint authorization

Summaryinfo

A vulnerability was found in Zitadel up to 3.4.8/4.12.2 and classified as problematic. The impacted element is an unknown function of the component API V2 Endpoint. The manipulation results in authorization. This vulnerability is reported as CVE-2026-33132. The attack can be launched remotely. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in Zitadel up to 3.4.8/4.12.2. Affected is an unknown code of the component API V2 Endpoint. The manipulation with an unknown input leads to a authorization vulnerability. CWE is classifying the issue as CWE-863. The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions. This is going to have an impact on confidentiality. CVE summarizes:

ZITADEL is an open source identity management platform. Versions prior to 3.4.9 and 4.0.0 through 4.12.2 allowed users to bypass organization enforcement during authentication. Zitadel allows applications to enforce an organzation context during authentication using scopes (urn:zitadel:iam:org:id:{id} and urn:zitadel:iam:org:domain:primary:{domainname}). If enforced, a user needs to be part of the required organization to sign in. While this was properly enforced for OAuth2/OIDC authorization requests in login V1, corresponding controls were missing for device authorization requests and all login V2 and OIDC API V2 endpoints. This allowed users to bypass the restriction and sign in with users from other organizations. Note that this enforcement allows for an additional check during authentication and applications relying on authorizations / roles assignments are not affected by this bypass. This issue has been patched in versions 3.4.9 and 4.12.3.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-33132 since 03/17/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not available.

Upgrading to version 1.80.0-v2.20.0.20260317120401-d90285929ca0, 3.4.9 or 4.12.3 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch d90285929ca019fa817f31551fd0883429dda2a8 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Name

• Zitadel

Version

• 3.4.0
• 3.4.1
• 3.4.2
• 3.4.3
• 3.4.4
• 3.4.5
• 3.4.6
• 3.4.7
• 3.4.8
• 4.12.0
• 4.12.1
• 4.12.2

License

• open-source

Website

• Product: https://github.com/zitadel/zitadel/

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