Remote Code Execution Vulnerability in JoySafeter by JD Open Source
CVE-2026-109443

8.7HIGH

Key Information:

Vendor

Jd-opensource

Status
Joysafeter
Vendor
CVE Published:
20 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-109443?

JoySafeter versions prior to 1.0.0 are vulnerable to a remote code execution flaw that enables authenticated users to execute arbitrary operating system commands. By leveraging an unsandboxed execute tool in the Copilot standard mode, attackers who can self-register may exploit the WebSocket chat.start extension. This occurs when the agent invokes subprocess.run with the shell parameter set to true, posing a risk of unauthorized access to sensitive data across different tenants and exposing server secrets.

Affected Version(s)

JoySafeter 0 <= 1.0.0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-109443 - Proof of Concept

References

https://www.lasso.security/vulnerability-database/cve-202...
technical-descriptionexploit
https://github.com/jd-opensource/JoySafeter/blob/12234a11...
technical-description
https://github.com/jd-opensource/JoySafeter/blob/12234a11...
technical-description

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Noy Pearl
Michael Sromin
Ophir Dror
.