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CVE-2026-109372 Details

ANALYZED

This CVE record has been analyzed and enriched by NVDAPI.com as an independent party.

Description

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.

Metrics

CVSS 3.x Severity and Vector Strings:

VolerionCVSS-B:5.9 MEDIUMVector:CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N

CNA: [email protected]CVSS-B:8.7 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/zitadel/zitadel/security/advisories/GHSA-x4c7-fpcx-w9q6	[email protected]	AdvisoryRemedyVendor
https://www.vulncheck.com/advisories/zitadel-3.0.0-before-4.19.2-account-takeover-via-saml-identity-provider-confusion	[email protected]	AdvisoryBundle

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-287	Improper Authentication	[email protected]

Affected Products

Product	Versions
ZITADEL	>= 4.0.0, <= 4.19.1 (semver) >= 3.0.0, <= 3.4.15 (semver)
CPE cpe:2.3:a:zitadel:zitadel:::::::: Remediation Upgrade: >= 4.19.2moderate efforthttps://github.com/zitadel/zitadel/releases/tag/v4.19.2 Mitigation:low effort Disable public organization registration (DisallowPublicOrgRegistration) on self-hosted deployments to prevent unauthenticated access to organization-administrator permission.

Change History

2 change records found show changes

Date	Action	Recorded By
Oct 13, 2026	CVE Modified	CISA-ADP
Oct 12, 2026	New CVE Received	[email protected]