---
cve: "CVE-2026-55672"
severity: "HIGH"
cvss: 7.4
epss: "0.4%"
vendor: "zitadel"
kev: false
exploited: false
published: "2026-07-10 17:19:05"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-20T18:29:40+02:00"
---

# CVE-2026-55672

> 7.4 HIGH · 🧪 PoC

## Beschreibung

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.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- c53d9774d4272d3cebeee4131012c20bd77b9dfb (Commit)
- c6b7e67548cfec209d7e22cd6256b04ca6b02995 (Commit)

## Referenzen

- <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>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-55672) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_