{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-56668","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-06-22T16:39:01.043Z","datePublished":"2026-07-10T17:46:25.937Z","dateUpdated":"2026-07-10T17:46:25.937Z"},"containers":{"cna":{"title":"ZITADEL: Unauthorized Token Privilege Escalation in OAuth2 Token Exchange","problemTypes":[{"descriptions":[{"cweId":"CWE-862","lang":"en","description":"CWE-862: Missing Authorization","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":8.1,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/zitadel/zitadel/security/advisories/GHSA-vrh8-c9cm-wh8v","tags":["x_refsource_CONFIRM"],"url":"https://github.com/zitadel/zitadel/security/advisories/GHSA-vrh8-c9cm-wh8v"},{"name":"https://github.com/zitadel/zitadel/commit/e2886a61670ca8fd41c9434f87036546e5620bcc","tags":["x_refsource_MISC"],"url":"https://github.com/zitadel/zitadel/commit/e2886a61670ca8fd41c9434f87036546e5620bcc"},{"name":"https://github.com/zitadel/zitadel/releases/tag/v4.15.3","tags":["x_refsource_MISC"],"url":"https://github.com/zitadel/zitadel/releases/tag/v4.15.3"}],"affected":[{"vendor":"zitadel","product":"zitadel","versions":[{"version":"< 4.15.3","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-07-10T17:46:25.937Z"},"descriptions":[{"lang":"en","value":"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."}],"source":{"advisory":"GHSA-vrh8-c9cm-wh8v","discovery":"UNKNOWN"}}}}