---
cve: "CVE-2026-55669"
severity: "MEDIUM"
cvss: 4.2
epss: "11%"
vendor: "zitadel"
kev: false
exploited: false
published: "2026-07-10 17:16:59"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-11T12:23:41+02:00"
---

# CVE-2026-55669

> 4.2 MEDIUM · 🧪 PoC

## Beschreibung

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.

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Hoch | good |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Gering | warn |
| I Integrität | Gering | warn |
| A Verfügbarkeit | Keine | good |

## Patch verfügbar (OSV)

- c53d9774d4272d3cebeee4131012c20bd77b9dfb (Commit)
- c6b7e67548cfec209d7e22cd6256b04ca6b02995 (Commit)

## Referenzen

- <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>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-55669) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_