CVE-2026-109372
ZITADEL 4.x before 4.19.2 and 3.x through 3.4.15 contains an authentication bypass in the SAML…
- Risk score
- 58/100
- CVSS
- 8.7 v3.1
- Exploit chance (30 days)
- 0.4%
- Published
- 12 Oct 2026
Open in the live forecast Today's forecast
What to know
- What it 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-admin…
- Affected
- See advisory
- Fix
- Upgrade the product to 4.19.2 or later.
- Exploitation
- No known exploitation
Why it is Yellow
- CVSS 8.7 high
References
Original 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.
Last activity 12 Oct 2026. Patch Forecast updates every hour.