PraisonAI: OS Command Injection in MCPHandler.parse_mcp_command()

{
  "id": "599bfb663081789ccd1f90bffc0b426387fedaff24f24b3c1578016155a86432",
  "url": "https://osv.dev/vulnerability/CVE-2026-34935",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "PraisonAI: OS Command Injection in MCPHandler.parse_mcp_command()",
    "summary": "PraisonAI is a multi-agent teams system. From version 4.5.15 to before version 4.5.69, the --mcp CLI argument is passed directly to shlex.split() and forwarded through the call chain to anyio.open_process() with no validation, allowlist check, or sanitization at any hop, allowing arbitrary OS command execution as the process user. This issue has been patched in version 4.5.69.",
    "evidence": "osv:CVE-2026-34935",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2026-34935",
      "aliases": [
        "CVE-2026-34935",
        "GHSA-9gm9-c8mq-vq7m",
        "PYSEC-2026-471"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/mervinpraison/praisonai",
              "type": "GIT",
              "events": [
                {
                  "introduced": "bbd320c50e0bc5402de03bca2ed8c274e5de42e0"
                },
                {
                  "fixed": "e144d840bbf59d13fdf149bb572933561f0dbc7c"
                },
                {
                  "fixed": "47bff65413beaa3c21bf633c1fae4e684348368c"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:praison:praisonai:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "4.5.15"
                      },
                      {
                        "fixed": "4.5.69"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "47bff65413beaa3c21bf633c1fae4e684348368c"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v4.5.68",
            "v4.5.67",
            "v4.5.65",
            "v4.5.64",
            "v4.5.63",
            "v4.5.62",
            "v4.5.60",
            "v4.5.59",
            "v4.5.58",
            "v4.5.57",
            "v4.5.56",
            "v4.5.55",
            "v4.5.54",
            "v4.5.52",
            "v4.5.51",
            "v4.5.49",
            "v4.5.48",
            "v4.5.46",
            "v4.5.45",
            "v4.5.44",
            "v4.5.43",
            "v4.5.42",
            "v4.5.41",
            "v4.5.40",
            "v4.5.39",
            "v4.5.38",
            "v4.5.37",
            "v4.5.36",
            "v4.5.35",
            "v4.5.34",
            "v4.5.33",
            "v4.5.32",
            "v4.5.31",
            "v4.5.30",
            "v4.5.29",
            "v4.5.28",
            "v4.5.27",
            "v4.5.26",
            "v4.5.25",
            "v4.5.24",
            "v4.5.23",
            "v4.5.22",
            "v4.5.21",
            "v4.5.20",
            "v4.5.19",
            "v4.5.18",
            "v4.5.17",
            "v4.5.16",
            "v4.5.15"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-34935.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:20.649634463Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34935.json",
        "https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-9gm9-c8mq-vq7m",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-34935",
        "https://github.com/MervinPraison/PraisonAI/commit/47bff65413beaa3c21bf633c1fae4e684348368c"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-78"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34935.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-34935",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 486520,
  "published_at": "2026-04-03T22:48:21.261+00:00"
}