ZITADEL 3.0.0 before 4.19.2 Privilege Escalation via OIDC Token Exchange Impersonation

{
  "id": "20d5a5b0f52602b6fdc15b0c3430dcac7ca3ecf3582c9802e27bda20e3ee9ef7",
  "url": "https://osv.dev/vulnerability/CVE-2026-109374",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "ZITADEL 3.0.0 before 4.19.2 Privilege Escalation via OIDC Token Exchange Impersonation",
    "summary": "ZITADEL 3.0.0 before 4.19.2 contains a privilege escalation vulnerability in OIDC token exchange that allows end-user impersonators to impersonate administrators including IAM_OWNER by bypassing the admin.impersonation check. Attackers holding IAM_END_USER_IMPERSONATOR or ORG_END_USER_IMPERSONATOR roles can sign in to relying applications as administrators with their roles and claims.",
    "evidence": "osv:CVE-2026-109374",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-109374",
      "aliases": [
        "CVE-2026-109374",
        "GHSA-w4gv-rcwj-w6r5"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/zitadel/zitadel",
              "type": "GIT",
              "events": [
                {
                  "introduced": "573c96d6af6aa8778efd9bff59f9bc0dab94c495"
                },
                {
                  "fixed": "2c37c4176ad51c3db0354122e06af53a88d30d4e"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "3.0.0"
                      },
                      {
                        "fixed": "4.19.2"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "3.0.0"
                      },
                      {
                        "fixed": "4.19.2"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v4.19.1",
            "v4.19.0",
            "v4.18.0",
            "v4.12.3",
            "v4.17.3",
            "v4.17.2",
            "v4.17.1",
            "v4.17.0",
            "v4.16.3",
            "v4.16.2",
            "v4.16.1",
            "v4.16.0",
            "v4.15.3",
            "v4.15.2",
            "v4.15.1",
            "v4.15.0",
            "v4.14.0",
            "v4.13.1",
            "v4.13.0",
            "v4.12.2",
            "v4.12.1",
            "v4.12.0",
            "v4.11.1",
            "v4.11.0",
            "v4.10.1",
            "v4.10.0",
            "v4.9.2",
            "v4.9.1",
            "v4.9.0",
            "v4.8.1",
            "v4.8.0",
            "v4.7.6",
            "v4.7.5",
            "v4.7.4",
            "v4.7.3",
            "v4.7.2",
            "v4.7.1",
            "v4.7.0",
            "v4.6.6",
            "v4.6.5",
            "v4.6.4",
            "v4.6.3",
            "v4.6.2",
            "v4.6.1",
            "v4.6.0",
            "v4.5.0",
            "v4.4.0",
            "v4.3.3",
            "v4.3.2",
            "v4.3.1",
            "v4.3.0",
            "v4.2.2",
            "v4.2.1",
            "v4.2.0",
            "v4.1.4",
            "v4.1.3",
            "v4.1.2",
            "v4.1.1",
            "v4.1.0",
            "v4.0.3",
            "v4.0.2",
            "v4.0.1",
            "v3.3.2",
            "v4.0.0",
            "v3.3.1",
            "v3.3.0",
            "v3.2.3",
            "v3.2.2",
            "v3.2.1",
            "v3.2.0",
            "v3.1.0",
            "v3.0.4",
            "v3.0.3",
            "v3.0.2",
            "v3.0.1",
            "v3.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-109374.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:53.175686016Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/109xxx/CVE-2026-109374.json",
        "https://github.com/zitadel/zitadel/security/advisories/GHSA-w4gv-rcwj-w6r5",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-109374",
        "https://www.vulncheck.com/advisories/zitadel-3.0.0-before-4.19.2-privilege-escalation-via-oidc-token-exchange-impersonation"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-863"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/109xxx/CVE-2026-109374.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-109374",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 522165,
  "published_at": "2026-10-12T16:05:46.811+00:00"
}