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Vulnerabilities CVE-2026-56668

CVE-2026-56668

High
Open
TLP:CLEAR

ZITADEL: Unauthorized Token Privilege Escalation in OAuth2 Token Exchange

NVD CVE.org
Critical Infrastructure

AI Analysis

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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.

Details

CVSS Score
8.1
EPSS Score
0.23%

14th percentile

CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Confidence
90%
Published
Jul 10, 2026
Last Modified
Jul 14, 2026
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