EUVD-2026-67809
GHSA-h3mc-9q4p-46jg
Severity by source
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Network-accessible API endpoint requires only low-privilege authentication (PR:L); exec() without sandboxing yields full CIA impact on the BISHENG server; scope unchanged consistent with CVSS 4.0 SC:N.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
3DescriptionCVE.org
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.
Articles & Coverage 1
AnalysisAI
Remote code execution in BISHENG's workflow engine (versions before 2.6.0) allows any authenticated user to submit crafted Code node definitions to the POST /api/v1/workflow/run_once endpoint, where they are evaluated via Python's exec() built-in without sandboxing or process isolation. Successful exploitation grants full server-side code execution with access to the host filesystem, stored credentials, and internal network resources reachable from the BISHENG backend process. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a valid BISHENG user account at any privilege level (PR:L per CVSS 4.0 vector) - administrator rights are not needed. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 8.7 (AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H) accurately captures the network-accessible, low-complexity attack path with high impact on the vulnerable system. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade BISHENG to version 2.6.0 or later, identified in the CVE description as the first non-vulnerable release. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: inventory all BISHENG deployments and their version numbers; restrict network access to the POST /api/v1/workflow/run_once endpoint to only trusted users and systems. …
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External POC / Exploit Code
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