CVE-2026-101102
Received Received - Intake

Code Execution in DeepSeek Harness Sandbox

Publication date: 2026-09-28

Last updated on: 2026-09-28

Assigner: VulDB

Description
A vulnerability was found in deepseek-ai deepseek-harness up to 0.1.0-rc.7. Impacted is the function run_code of the component Code Mode Sandbox. The manipulation results in sandbox issue. The attack can be executed remotely. The vendor's own code, SAFETY.md, and design notes all explicitly state the worker is "containment, not a security boundary". The vendor was contacted early about this disclosure but did not respond in any way.

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Meta Information

Published
2026-09-28
Last Modified
2026-09-28
Generated
2026-09-28
AI Q&A
2026-09-28
EPSS Evaluated
N/A
NVD
CVE-2026-101102
EUVD
EUVD-2026-88402

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
deepseek-ai deepseek-harness to 0.1.0-rc.7 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-265
CWE-264 Permissions, Privileges, and Access Controls

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Executive Summary

This vulnerability affects the deepseek-harness software up to version 0.1.0-rc.7. It involves a sandbox issue in the Code Mode Sandbox component, specifically in the run_code function. The sandbox is designed for containment, not as a security boundary, meaning it may not fully prevent malicious actions. The attack can be executed remotely.

Detection Guidance

This vulnerability involves a sandbox escape in deepseek-harness up to 0.1.0-rc.7. Detection requires checking for unauthorized code execution outside the sandbox environment. Monitor for unexpected system calls or processes spawned by the deepseek-harness application. Review logs for any signs of privilege escalation or lateral movement.

Impact Analysis

The vulnerability could allow remote attackers to escape the sandbox and execute unauthorized code or actions. This may lead to data breaches, unauthorized access to sensitive information, or system compromise, depending on the software's usage context.

Compliance Impact

The vulnerability allows remote execution of code in a sandbox environment that is explicitly not designed as a security boundary. This could lead to unauthorized access or data exfiltration, which may violate GDPR's data protection requirements or HIPAA's safeguards for protected health information if exploited.

Mitigation Strategies

Immediately upgrade deepseek-harness to a version beyond 0.1.0-rc.7 where the vulnerability is addressed. If no patch exists, disable the Code Mode Sandbox feature entirely as it is not a security boundary. Monitor network traffic for unusual code execution requests.

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