CVE-2026-109443
JoySafeter through 1.0.0 Authenticated RCE via Copilot Standard Mode Shell
- State
- Published
- Severity
- 8.7 High
- Published
- Oct 20, 2026
- Updated
- Oct 22, 2026
- Reserved
- Oct 12, 2026
Description
JoySafeter through 1.0.0 contains a remote code execution vulnerability that allows authenticated users to run operating system commands via an unsandboxed execute tool in Copilot standard mode. Attackers can self-register, select standard mode in the WebSocket chat.start extension, and have the agent invoke subprocess.run with shell=True on the host to access other tenants' data and server secrets.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.7 High | 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 | VulnCheck |
| 3.1 | 8.8 High | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | VulnCheck |
Weaknesses
- CWE-653 Improper Isolation or Compartmentalization
Affected Products
| Product | Versions |
|---|---|
JoySafeterjd-opensource |
|
References
- Lasso.security Advisorytechnical-descriptionexploit
- https://github.com/jd-opensource/JoySafeter/blob/12234a11a9d96acef85577afb1fa5682169d6171/backend/app/core/agent/backends/utils/command_executor.py#L110technical-description
- https://github.com/jd-opensource/JoySafeter/blob/12234a11a9d96acef85577afb1fa5682169d6171/backend/app/services/copilot_service.py#L106technical-description
- VulnCheck Advisory: JoySafeter through 1.0.0 Authenticated RCE via Copilot Standard Mode Shellthird-party-advisory
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