CVE-2026-51861

Deferred Deferred - Pending Action

Code Injection in Bisheng API v1 Validate Module

Publication date: 2026-09-30

Last updated on: 2026-10-02

Assigner: MITRE

Description

bisheng 2.3.0, 2.4.0, and 2.4.0-beta1 is vulnerable to Code Injection in src/backend/bisheng/api/v1/validate.py.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-09-30

Last Modified

2026-10-02

Generated

2026-10-19

AI Q&A

2026-10-01

EPSS Evaluated

2026-10-18

NVD

CVE-2026-51861

Affected Vendors & Products

Vendor	Product	Version / Range
bisheng	bisheng	2.3.0
bisheng	bisheng	2.4.0
bisheng	bisheng	2.4.0_beta1

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-94	The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.

Attack-Flow Graph

Executive Summary

The vulnerability in bisheng versions 2.3.0, 2.4.0, and 2.4.0-beta1 allows for code injection through the file src/backend/bisheng/api/v1/validate.py. This means an attacker could potentially execute arbitrary code on the affected system.

Detection Guidance

To detect this vulnerability, check if your bisheng instance is running versions 2.3.0, 2.4.0, or 2.4.0-beta1. Inspect the file src/backend/bisheng/api/v1/validate.py for the presence of the validate_code function and verify if it uses exec(code_obj) without sandboxing. Monitor network traffic for POST requests to /api/v1/validate/code with unusual payloads containing code injection attempts.

Impact Analysis

This vulnerability could allow unauthorized code execution, leading to data breaches, system compromise, or further network infiltration. Users running vulnerable versions should update immediately.

Compliance Impact

The provided CVE data does not specify how this vulnerability impacts compliance with standards like GDPR or HIPAA. Without additional context on data exposure or processing implications, no direct compliance impact can be determined.

Mitigation Strategies

Immediately upgrade to a patched version of bisheng beyond 2.3.0, 2.4.0, or 2.4.0-beta1. Review and restrict access to the validate.py file in src/backend/bisheng/api/v1/. Monitor for unusual code execution patterns or unauthorized changes in the application.

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