Remote Code Execution Vulnerability in DeepSeek Harness by DeepSeek
CVE-2026-116367

5.3MEDIUM

Key Information:

Vendor

Deepseek

Status
Harness
Vendor
CVE Published:
26 October 2026

What is CVE-2026-116367?

A vulnerability exists in the DeepSeek Harness up to version 0.1.0-rc.5, specifically within the createContext function located in sandbox.ts. This flaw can lead to unauthorized remote code execution, potentially compromising the system's integrity. Attempts to notify the vendor about this issue went unanswered, increasing the urgency for users to address this vulnerability to prevent exploitation.

Affected Version(s)

Harness 0.1.0-rc.0

Harness 0.1.0-rc.1

Harness 0.1.0-rc.2

References

https://vuldb.com/vuln/426331
vdb-entrytechnical-description
https://vuldb.com/vuln/426331/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-116367
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

JerryGW (VulDB User)
VulDB CNA Team
.