---
id: CVE-2026-82278
title: >-
  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
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/v…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-94
published: '2026-08-28'
updated: '2026-09-23'
sourceUpdated: '2026-09-23T17:17:46.023'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-82278'
references:
  - url: 'https://github.com/dataelement/bisheng'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/dataelement/bisheng/blob/v2.4.0/src/backend/bisheng/api/services/workflow.py
    label: disclosure@vulncheck.com
  - url: 'https://github.com/dataelement/bisheng/issues/2189'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/bisheng-authenticated-arbitrary-python-code-execution-via-workflow-run-once
    label: disclosure@vulncheck.com
  - url: 'https://github.com/dataelement/bisheng/issues/2189'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
epss: 0.00739
epssPercentile: 0.5263
ingestedAt: '2026-09-23T17:28:14.814Z'
vendor: dataelement
product: bisheng
affected:
  - bisheng < 2.6.0
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-08-28T20:25:58.929495Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.