SimpleChat plugin validation endpoints missing authentication and authorization

{
  "id": "89cede6b67d8130a57ac084d84e9c7ac2fceadf2499acbb50e5099f7b78418db",
  "url": "https://osv.dev/vulnerability/CVE-2026-57206",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "SimpleChat plugin validation endpoints missing authentication and authorization",
    "summary": "SimpleChat is a secure AI conversation application with personal and group workspaces for document-grounded interactions. Prior to 0.241.206, several plugin validation routes in application/single_app/plugin_validation_endpoint.py, including `POST /api/admin/plugins/test-instantiation`, `GET /api/admin/plugins/health-check/`, `POST /api/admin/plugins/repair/`, and `POST /api/plugins/validate`, relied on @swagger_route(security=get_auth_security()) documentation without enforcing @login_required, @user_required, or @admin_required at runtime, allowing unauthenticated or unauthorized clients to invoke plugin validation, health, and repair behavior. This issue is fixed in version 0.241.206.",
    "evidence": "osv:CVE-2026-57206",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-57206",
      "aliases": [
        "CVE-2026-57206",
        "GHSA-g6gr-xp46-hrmj"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/microsoft/simplechat",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "ff8059163e09ede433003b1ed2822061c41239fe"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "fixed": "ff8059163e09ede433003b1ed2822061c41239fe"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v0.250.001"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.241.007",
            "v0.241.006",
            "v0.241.002",
            "v0.241.001",
            "v0.239.002",
            "v0.239.001",
            "v0.237.011",
            "v0.237.009",
            "v0.237.007",
            "v0.237.006",
            "v0.237.005",
            "v0.237.004",
            "v0.237.003",
            "v0.237.001",
            "v0.235.025",
            "v0.235.012",
            "v0.235.003",
            "v0.235.001",
            "v0.229.098",
            "v0.229.063",
            "v0.229.062",
            "v0.229.061",
            "v0.229.060",
            "v0.229.058",
            "v0.229.014",
            "v0.229.002",
            "v0.229.001",
            "v0.215.38",
            "v0.215.37",
            "v0.215.36",
            "v0.215.35",
            "v0.215.34",
            "v0.214.001",
            "v0.213.003",
            "v0.213.001",
            "v0.212.091",
            "v0.212.079",
            "v0.212.078",
            "v0.203.15",
            "v0.203.16",
            "0.202.41",
            "0.202.37",
            "v0.202.21",
            "v0.201.5",
            "v0.199.3",
            "v0.196.9",
            "v0.191.0",
            "0.190.3",
            "0.190.1",
            "v0.185.1",
            "v0.185.0",
            "v0.179.group_documents.13"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-57206.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:41.098890144Z",
      "provider": "osv",
      "references": [
        "https://github.com/microsoft/simplechat/blob/main/docs/explanation/fixes/PLUGIN_VALIDATION_ROUTE_AUTH_FIX.md",
        "https://github.com/microsoft/simplechat/releases/tag/v0.250.001",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/57xxx/CVE-2026-57206.json",
        "https://github.com/microsoft/simplechat/security/advisories/GHSA-g6gr-xp46-hrmj",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-57206"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-306",
          "CWE-862"
        ],
        "cna_assigner": "GitHub_M",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "fixed": "0.241.206"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StringRangeExpression"
              }
            ]
          },
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "fixed": "0.241.206"
                  },
                  {
                    "fixed": "0.241.206"
                  }
                ],
                "source": "DESCRIPTION"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/57xxx/CVE-2026-57206.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-57206",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 508781,
  "published_at": "2026-07-16T15:17:05.558+00:00"
}