Improper authentication in zitadel
Priority LOW 35CWE-287Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-287.
Summary
ZITADEL is an open source identity management platform. Prior to 3.4.12 and 4.15.2, ZITADEL's OAuth2 and OIDC CodeExchange, RefreshToken, and device token flows fail to verify that the requesting client matches the client that initiated the authorization flow, allowing intercepted grants or refresh tokens to be exchanged under a different client. This issue is fixed in versions 3.4.12 and 4.15.2.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00433 37th percentileScored 2026-11-07
Fix Fixed zitadel (zitadel): 4.15.2, 3.4.12github.com/zitadel/zitadel (Go): 1.80.0-v2.20.0.20260616131956-0973b074b488
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| zitadel | zitadel | 4.0.0-rc.1 to before 4.15.2; before 3.4.12 | 4.15.2, 3.4.12 | Patch available | CNA |
| — | github.com/zitadel/zitadel (Go) | before 1.80.0-v2.20.0.20260616131956-0973b074b488 | 1.80.0-v2.20.0.20260616131956-0973b074b488 | Patch available | GHSA-xqxv-4jc2-x56x |
- zitadel Vendorzitadel Affected 4.0.0-rc.1 to before 4.15.2; before 3.4.12 Fixed in 4.15.2, 3.4.12 Patch available CNA
- github.com/zitadel/zitadel (Go) Vendor— Affected before 1.80.0-v2.20.0.20260616131956-0973b074b488 Fixed in 1.80.0-v2.20.0.20260616131956-0973b074b488 Patch available GHSA-xqxv-4jc2-x56x
Remediation
- Fix · CNA zitadel (zitadel) Fixed in 4.15.2, 3.4.12
- Fix · GHSA-xqxv-4jc2-x56x github.com/zitadel/zitadel (Go) Fixed in 1.80.0-v2.20.0.20260616131956-0973b074b488 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-55672
- 2026-10-03 Alias added: GHSA-xqxv-4jc2-x56x
References
Other 7
- https://github.com/zitadel/zitadel/security/advisories/GHSA-xqxv-4jc2-x56x
- https://github.com/zitadel/zitadel/commit/562403079a98cf2059cdac11865a45e2f285be71
- https://github.com/zitadel/zitadel/commit/5b1708e0e650398f0ebc3341714f0798b0118917
- https://github.com/zitadel/zitadel/releases/tag/v3.4.12
- https://github.com/zitadel/zitadel/releases/tag/v4.15.2
- https://github.com/zitadel/zitadel/commit/0973b074b48816757c47fe732b06d2488d3d284c
- https://github.com/zitadel/zitadel
More zitadel vulnerabilities
- TI-2024-26607 ZITADEL Vulnerable to Session Information Leakage CVSS 3.1MEDIUM 6.5
- TI-2026-67551 ZITADEL before 4.16.2 Account Pre-Hijacking via Forged External IdP Callback CVSS 4.0CRITICAL 9.3
- TI-2026-67543 ZITADEL before 4.17.3 Account Takeover via External IdP Linking CVSS 4.0CRITICAL 9.3
- TI-2025-41253 ZITADEL Vulnerable to Unauthenticated Full-Read SSRF via V2 Login CVSS 3.1CRITICAL 9.3
- TI-2025-39554 Zitadel Bypass Second Authentication Factor CVSS 4.0HIGH 8.7
- TI-2026-82647 ZITADEL Login V2 flaw lets attackers approve device authorizations CVSS 4.0HIGH 8.6
Sources
- CVE-2026-55672 · CVE Program
- CVE-2026-55672 · NVD
- FIRST EPSS
- GHSA-xqxv-4jc2-x56x · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences