LibreChat Shared MCP Server View Leaks Decrypted Admin Secrets

{
  "id": "8ff58baf133c976e040415761215cede0e80a7869e031c770ed7b242b30fd53f",
  "url": "https://osv.dev/vulnerability/CVE-2026-44653",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "LibreChat Shared MCP Server View Leaks Decrypted Admin Secrets",
    "summary": "LibreChat is an enhanced ChatGPT clone that supports multiple AI providers. In versions up to and including 0.8.3, users with only `VIEW` access to an MCP server can retrieve the server's decrypted admin-managed secrets through `GET /api/mcp/servers` and `GET /api/mcp/servers/:serverName`. The returned config includes plaintext values for `apiKey.key` and `oauth.client_secret`. This allows viewers of a shared MCP server to exfiltrate the underlying provider credentials. Version 0.8..4 contains a patch. Other remediations include: never returning decrypted admin-managed secrets to non-owners; redacting apiKey.key and oauth.client_secret from all API responses consider returning only boolean presence indicators for secrets, similar to the auth-values route pattern; and, if owners need to edit configs without re-entering secrets, preserving secrets server-side and returning placeholders instead of plaintext.",
    "evidence": "osv:CVE-2026-44653",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-44653",
      "aliases": [
        "CVE-2026-44653",
        "GHSA-6vqg-rgpm-qvf9"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/LibreChat-AI/LibreChat",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "0736ff26686e911c9785a237c63a799db1813f0b"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.8.4"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "cpe": "cpe:2.3:a:librechat:librechat:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.8.4"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.8.4-rc1",
            "chart-2.0.1",
            "v0.8.3",
            "chart-2.0.0",
            "v0.8.3-rc2",
            "chart-1.9.9",
            "v0.8.3-rc1",
            "chart-1.9.8",
            "v0.8.2",
            "chart-1.9.7",
            "v0.8.2-rc3",
            "chart-1.9.6",
            "v0.8.2-rc2",
            "chart-1.9.5",
            "v0.8.2-rc1",
            "v0.8.1",
            "chart-1.9.4",
            "v0.8.1-rc2",
            "chart-1.9.3",
            "v0.8.1-rc1",
            "chart-1.9.2",
            "v0.8.0",
            "chart-1.9.1",
            "v0.8.0-rc4",
            "chart-1.9.0",
            "v0.8.0-rc3",
            "v0.8.0-rc2",
            "v0.8.0-rc1",
            "v0.7.9",
            "librechat-1.8.9",
            "v0.7.9-rc1",
            "v0.7.8",
            "v0.7.8-rc1",
            "v0.7.7",
            "v0.7.7-rc1",
            "v0.7.6",
            "v0.7.6-rc1",
            "v0.7.5",
            "v0.7.5-rc2",
            "v0.7.5-rc1",
            "v0.7.4",
            "v0.7.4-rc1",
            "v0.7.3",
            "v0.7.3-rc2",
            "v0.7.3-rc",
            "v0.7.2",
            "v0.7.1",
            "v0.7.0",
            "v0.6.10",
            "v0.6.9",
            "v0.6.6",
            "v0.6.5",
            "v0.6.1",
            "v0.6.0",
            "v0.5.9",
            "v0.5.8",
            "v0.5.7",
            "v0.5.6",
            "v0.5.5",
            "v0.5.4",
            "v0.5.3",
            "v0.5.2",
            "v0.5.1",
            "v0.5.0",
            "v0.4.8",
            "v0.4.7",
            "v0.4.6",
            "v0.4.5",
            "v0.4.4",
            "v0.4.3",
            "v0.4.2",
            "v0.4.1",
            "v0.4.0",
            "v0.3.3",
            "v0.3.0",
            "v0.2.0",
            "v0.1.1",
            "v0.1.0",
            "v0.0.6",
            "v0.0.3",
            "v0.0.2",
            "v0.0.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44653.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:38.153944891Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44653.json",
        "https://github.com/danny-avila/LibreChat/security/advisories/GHSA-6vqg-rgpm-qvf9",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-44653"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-201"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44653.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-44653",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 505717,
  "published_at": "2026-06-02T22:40:20.672+00:00"
}