CVE-2026-56668
HIGH SEVERITYCVSS Score & Metrics
Base Score
8.1 / 10
Vector String
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Vulnerability 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.
Vulnerability Details
Published Date
Last Modified
CWE ID
CWE-862
Source
NVD
Vendor
zitadel
Product
zitadel
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