ZITADEL: Missing Token Audience Validation (`aud`) in JWT IdP Provider
Priority LOW 19CWE-346Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- High
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-346.
Summary
ZITADEL is an open source identity management platform. Prior to 3.4.12 and 4.15.2, ZITADEL's external JWT Identity Provider validates a token's signature and issuer (iss) but not the audience (aud) claim, allowing a validly signed token from a trusted issuer for another relying party to be accepted by ZITADEL. 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 0.00155 4th percentileScored 2026-11-07
Fix Fixed zitadel (zitadel): 4.15.2, 3.4.12github.com/zitadel/zitadel (Go): 1.80.0-v2.20.0.20260615132747-d184e976fc79
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
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-v2.20.0.20260615132747-d184e976fc79 | 1.80.0-v2.20.0.20260615132747-d184e976fc79 | Patch available | GHSA-g5h5-m4hm-xjrr |
- 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-v2.20.0.20260615132747-d184e976fc79 Fixed in 1.80.0-v2.20.0.20260615132747-d184e976fc79 Patch available GHSA-g5h5-m4hm-xjrr
Remediation
- Fix · CNA zitadel (zitadel) Fixed in 4.15.2, 3.4.12
- Fix · GHSA-g5h5-m4hm-xjrr github.com/zitadel/zitadel (Go) Fixed in 1.80.0-v2.20.0.20260615132747-d184e976fc79 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-55669
- 2026-10-03 Alias added: GHSA-g5h5-m4hm-xjrr
References
Other 5
- https://github.com/zitadel/zitadel/security/advisories/GHSA-g5h5-m4hm-xjrr
- 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/d184e976fc799a383bb6ef9f32c3bae11a3ef85f
- 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-2026-55669 · CVE Program
- CVE-2026-55669 · NVD
- FIRST EPSS
- GHSA-g5h5-m4hm-xjrr · 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