Incorrect Authorization Affecting github.com/zitadel/zitadel/internal/command package, versions >=3.0.0 <3.4.12>=4.0.0 <4.15.2
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published1 Jul 2026
- disclosed18 Jun 2026
- creditUnknown
Introduced: 18 Jun 2026
CVE-2026-55672 (opens in a new tab)How to fix?
Upgrade github.com/zitadel/zitadel/internal/command to version 3.4.12, 4.15.2 or higher.
Overview
Affected versions of this package are vulnerable to Incorrect Authorization in the CodeExchange and RefreshToken processes. An attacker can gain unauthorized access to user accounts or maintain persistent access from an unauthorized client by presenting intercepted authorization codes or refresh tokens under a different client identity. This is only exploitable if an attacker is able to obtain valid authorization codes or refresh tokens through a pre-existing vulnerability or data leak within the target application environment.
Workaround
This vulnerability can be mitigated by enforcing the use of PKCE for all clients to reduce the risk of authorization code injection and by minimizing refresh token lifespans.