CVE-2026-56668

{"id": "CVE-2026-56668", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-56668", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-07-14T13:39:42.876575Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.1, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.2, "exploitabilityScore": 2.8}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "zitadel", "product": "zitadel", "versions": [{"status": "affected", "version": "< 4.15.3"}]}]}], "published": "2026-07-10T18:16:24.413", "references": [{"url": "https://github.com/zitadel/zitadel/commit/e2886a61670ca8fd41c9434f87036546e5620bcc", "source": "security-advisories@github.com"}, {"url": "https://github.com/zitadel/zitadel/releases/tag/v4.15.3", "source": "security-advisories@github.com"}, {"url": "https://github.com/zitadel/zitadel/security/advisories/GHSA-vrh8-c9cm-wh8v", "source": "security-advisories@github.com"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-862"}]}], "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."}], "lastModified": "2026-07-14T14:16:35.310", "sourceIdentifier": "security-advisories@github.com"}