CVE-2026-109372 — ZITADEL 3.0.0 before 4.19.2 Account Takeover via SAML Identity-Provider Confusion
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 th…
Published: 2026-10-12 · CVSS: 9.3 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7