CVE-2026-56668

Published: Jul 10, 2026Modified: Jul 14, 2026Deferred

8.1

Vector

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

Exploitability: 2.8 / Impact: 5.2

Source: security-advisories@github.com (Secondary)

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.

Related CWEs

CWE-862

Missing Authorization

The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

References (3)

https://github.com/zitadel/zitadel/commit/e2886a61670ca8fd41c9434f87036546e5620bcc

Source: security-advisories@github.com

https://github.com/zitadel/zitadel/releases/tag/v4.15.3

Source: security-advisories@github.com

https://github.com/zitadel/zitadel/security/advisories/GHSA-vrh8-c9cm-wh8v

Source: security-advisories@github.com

Timeline

No history available yet.