CVE-2026-56668
ZITADEL: Unauthorized Token Privilege Escalation in OAuth2 Token Exchange
- State
- Published
- Severity
- 8.1 High
- Published
- Jul 10, 2026
- Updated
- Jul 14, 2026
- Reserved
- Jun 22, 2026
Description
ZITADEL is an open source identity management platform. Prior to 4.15.3, ZITADEL's OAuth2 Token Exchange endpoint for urn:ietf:params:oauth:grant-type:token-exchange does not verify that the subject token belongs to the requesting client or that requested scopes remain within the original token's scopes, allowing a low-privilege token to be exchanged for elevated permissions at another application. This issue is fixed in version 4.15.3.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 8.1 High | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N | GitHub_M |
Weaknesses
- CWE-862 Missing Authorization
Affected Products
| Product | Versions |
|---|---|
zitadelzitadel |
|
References
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