{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "4.15.3"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "e2886a61670ca8fd41c9434f87036546e5620bcc"
            }
          ],
          "repo": "https://github.com/zitadel/zitadel",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-vrh8-c9cm-wh8v"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-862"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56668.json"
  },
  "details": "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.",
  "id": "CVE-2026-56668",
  "modified": "2026-07-16T03:31:02.745782153Z",
  "published": "2026-07-10T17:46:25.937Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/zitadel/zitadel/releases/tag/v4.15.3"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56668.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/zitadel/zitadel/security/advisories/GHSA-vrh8-c9cm-wh8v"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-56668"
    },
    {
      "type": "FIX",
      "url": "https://github.com/zitadel/zitadel/commit/e2886a61670ca8fd41c9434f87036546e5620bcc"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "ZITADEL: Unauthorized Token Privilege Escalation in OAuth2 Token Exchange"
}