CVE-2026-56668

highCVSS 8.1covered by 1 sourcefirst seen 2026-07-10

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.

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Advisory coverage (1)

highCVE-2026-56668: ZITADEL is an open source identity management platform. Prior to 4.15.3, ZITADEL's OAuth2 Toke…nvd · 2026-07-10

External references

NVD record for CVE-2026-56668

CVE.org record

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