Zitadel up to 3.4.15/4.19.1 SAML Identity-Provider Intent Callback privileges management

Summaryinfo

A vulnerability has been found in Zitadel up to 3.4.15/4.19.1 and classified as problematic. This affects an unknown function of the component SAML Identity-Provider Intent Callback. The manipulation leads to privileges management. This vulnerability is documented as CVE-2026-109372. The attack can be initiated remotely. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Zitadel up to 3.4.15/4.19.1. This issue affects an unknown part of the component SAML Identity-Provider Intent Callback. The manipulation with an unknown input leads to a privileges management vulnerability. Using CWE to declare the problem leads to CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

ZITADEL 4.x before 4.19.2 and 3.x through 3.4.15 contains an authentication bypass in the SAML identity-provider intent callback, which verifies the assertion signature using the provider named in the request URL but resolves the user from the login intent without checking they match. Attackers with organization-administrator permission can register a SAML provider with their own signing key to obtain authenticated sessions as any user linked to another SAML provider on the instance, including in other organizations.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-109372 since 10/12/2026. The exploitation is known to be easy. The attack may be initiated remotely. The exploitation needs additional levels of successful authentication. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1068 for this issue.

Upgrading to version 4.19.2 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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
• 3.4.9
• 3.4.10
• 3.4.11
• 3.4.12
• 3.4.13
• 3.4.14
• 3.4.15
• 4.19.0
• 4.19.1

Website

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

CPE 2.3info

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CPE 2.2info

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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