CVE-2026-56668

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.

PUBLISHED Reserved 2026-06-22 | Published 2026-07-10 | Updated 2026-07-14 | Assigner GitHub_M

Problem types

CWE-862: Missing Authorization

Product status

References

github.com/...itadel/security/advisories/GHSA-vrh8-c9cm-wh8v

github.com/...ommit/e2886a61670ca8fd41c9434f87036546e5620bcc

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

cve.org (CVE-2026-56668)

nvd.nist.gov (CVE-2026-56668)

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