CVE-2026-56668
8.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| zitadel | zitadel | < 4.15.3 | affected |
Weaknesses
- CWE-862: CWE-862: Missing Authorization
References
- https://github.com/zitadel/zitadel/security/advisories/GHSA-vrh8-c9cm-wh8v
- https://github.com/zitadel/zitadel/commit/e2886a61670ca8fd41c9434f87036546e5620bcc
- https://github.com/zitadel/zitadel/releases/tag/v4.15.3
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