Insufficient OIDC endpoint validation could invoke unintended local protocol handlers

{
  "id": "fcc146b5bba034bd23600c78c4457df5535d0f71c55340f3fb180ef40eee2d82",
  "url": "https://osv.dev/vulnerability/CVE-2026-19503",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Insufficient OIDC endpoint validation could invoke unintended local protocol handlers",
    "summary": "MongoDB Schema Manager and MongoDB Atlas SQL ODBC Driver do not validate the scheme of the authorization and token endpoints returned by an OIDC issuer's discovery document. A user induced to connect to an uncontrolled MongoDB deployment using MONGODB-OIDC authentication may have an uncontrolled URI dispatched to their operating system's default protocol handler, potentially exposing credentials or, under certain conditions, resulting in code execution in the user's context.",
    "evidence": "osv:CVE-2026-19503",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-19503",
      "aliases": [
        "CVE-2026-19503"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/mongodb/mongo-odbc-driver",
              "type": "GIT",
              "events": [
                {
                  "introduced": "9a299ba9c161a41e3cebda9abb23b21e0e826af1"
                },
                {
                  "fixed": "ca89bbdf01211cc3c823a6f04d2b60c89ff65fda"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:mongodb:odbc_driver:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "1.0.0"
                      },
                      {
                        "fixed": "2.0.9"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v2.0.8",
            "v2.0.7",
            "v2.0.6",
            "v2.0.5",
            "v2.0.4",
            "v2.0.3",
            "v2.0.2",
            "v2.0.1",
            "v2.0.0",
            "v2.0.0-beta-6-libv1.0.0-beta-6",
            "v2.0.0-beta-5-libv-1.0.0-beta-6",
            "v1.4.6",
            "v1.4.5",
            "v2.0.0-beta-4-libv1.0.0-beta-5",
            "v2.0.0-beta-3-libv1.0.0-beta-4",
            "v2.0.0-beta-2-libv1.0.0-beta-3",
            "v2.0.0-beta-1-libv1.0.0-beta-2",
            "v2.0.0-beta-libv1.0.0-beta-1",
            "v2.0.0-alpha-libv1.0.0-alpha-1",
            "v2.0.0-alpha-libv1.0.0-alpha",
            "v1.4.1",
            "v1.4.0",
            "v1.3.4",
            "v1.3.3",
            "v1.3.2",
            "v1.3.1",
            "v1.3.0",
            "another_test",
            "v1.2.0",
            "v1.1.0",
            "v1.0.2",
            "v1.0.1",
            "v1.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-19503.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:38.560157829Z",
      "provider": "osv",
      "references": [
        "https://www.mongodb.com/docs/sql-interface/changelog",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/19xxx/CVE-2026-19503.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-19503"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-20"
        ],
        "cna_assigner": "mongodb",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "1.0.0"
                  },
                  {
                    "fixed": "2.0.9"
                  },
                  {
                    "introduced": "1.0.1"
                  },
                  {
                    "fixed": "1.2.1"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/19xxx/CVE-2026-19503.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-19503",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 506239,
  "published_at": "2026-08-12T20:17:55.369+00:00"
}