CVE-2026-109372ZITADEL 3.0.0 before 4.19.2 Account Takeover via SAML Identity-Provider Confusion
Updated under an hour ago ()
Does this affect you?
It affects zitadel. Add what you run to find out whether that includes you.
EPSS puts the chance of exploitation in the next 30 days at 0.37%, higher than 29% of scored CVEs.
Do this next
Free account, 1 product
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.
- CVSS
- 8.7 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N
- Weakness (CWE)
- CWE-287
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.37% (percentile 29)
- Assigned by
- VulnCheck
- NVD analysis
- Deferred
- Record last updated
- Oct 13, 2026
- First seen by InfoSec Signals
- Oct 12, 2026
Affected products
zitadel zitadel zitadel:zitadel (from the name) | from 3.0.0 before 4.19.2; 4.19.2 not affected | CNA record |
References
- https://github.com/zitadel/zitadel/security/advisories/GHSA-x4c7-fpcx-w9q6vendor-advisory
- https://www.vulncheck.com/advisories/zitadel-3.0.0-before-4.19.2-account-takeover-via-saml-identity-provider-confusionthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.