BISHENG Authenticated Arbitrary Python Code Execution via Workflow run_once

{
  "id": "ddbaa50d60e092db7260ea101141bdb62fb3a53548f75409d173134f41a10e95",
  "url": "https://osv.dev/vulnerability/CVE-2026-82278",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "BISHENG Authenticated Arbitrary Python Code Execution via Workflow run_once",
    "summary": "BISHENG before 2.6.0 contains a remote code execution vulnerability in the workflow run_once endpoint that allows authenticated users to execute arbitrary Python code. Attackers can submit crafted Code node definitions to the POST /api/v1/workflow/run_once endpoint, which executes them with exec() without sandboxing, gaining access to filesystem, credentials, and internal network resources.",
    "evidence": "osv:CVE-2026-82278",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-82278",
      "aliases": [
        "CVE-2026-82278"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/dataelement/bisheng",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "a3788115d71f4b5888a34fbe7e1f0f3f9f13784c"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "2.6.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "2.6.0"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v2.4.0-beta1-fix",
            "v2.4.0-beta1",
            "v2.3.0",
            "v2.3.0-beta3",
            "v2.3.0-beta2",
            "v2.3.0-beta1",
            "v2.2.0",
            "v2.2.0-beta3",
            "v2.2.0-beta2",
            "v2.1.1",
            "v2.2.0-beta1",
            "v2.1.0",
            "v2.0.3",
            "v2.0.2",
            "v2.0.1",
            "v2.0.0",
            "v1.3.1",
            "v1.3.0",
            "v1.2.1",
            "v1.2.0",
            "v1.0.1",
            "v1.1.1",
            "v1.1.0",
            "v1.0.0",
            "v0.4.1.2",
            "v0.4.1.1",
            "v0.4.1",
            "v0.4.0.dev2",
            "v0.4.0.dev1",
            "v0.3.7.1",
            "v0.3.7",
            "v0.3.7.dev2",
            "v0.3.7.dev1",
            "v0.3.6.dev1",
            "v0.3.5.dev1",
            "v0.3.4",
            "v0.3.4.dev3",
            "v0.3.4.dev2",
            "v0.3.4.dev1",
            "v0.3.3.dev2",
            "v0.3.3.dev1",
            "v0.3.3beta",
            "v0.3.3rc1",
            "v0.3.2.2",
            "v0.3.2.1",
            "v0.3.2",
            "v0.3.1.2",
            "v0.3.1.1",
            "v0.3.1",
            "v0.3.0rc1",
            "v0.3.0rc0",
            "v0.3.0beta",
            "v0.2.3.2",
            "v0.2.3",
            "v0.2.2.6",
            "v0.2.2.5",
            "v0.2.2.4",
            "v0.2.2.3",
            "v0.2.2.2",
            "v0.2.2.1",
            "v0.2.2",
            "v0.2.1.2",
            "v0.2.1",
            "v0.2.0_rc1",
            "v0.2.0",
            "v0.1.10.1",
            "v0.1.10",
            "v0.1.9.5",
            "v0.1.9.4",
            "v0.1.9.3",
            "v0.1.9.2",
            "v0.1.9.1",
            "v0.1.9",
            "v0.1.8",
            "v0.1.7",
            "v0.1.6",
            "v0.1.5",
            "v0.1.4",
            "v0.1.3",
            "v0.1.2",
            "v0.1.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-82278.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:23.963446452Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82278.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-82278",
        "https://www.vulncheck.com/advisories/bisheng-authenticated-arbitrary-python-code-execution-via-workflow-run-once",
        "https://github.com/dataelement/bisheng/issues/2189",
        "https://github.com/dataelement/bisheng",
        "https://github.com/dataelement/bisheng/blob/v2.4.0/src/backend/bisheng/api/services/workflow.py"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-94"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82278.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-82278",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 490557,
  "published_at": "2026-08-28T16:18:58.973+00:00"
}