CVE-2026-109443

JoySafeter through 1.0.0 Authenticated RCE via Copilot Standard Mode Shell

Published Oct 20, 2026 CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Jd-opensource
Jd-opensource joysafeter
Vendors & Products Jd-opensource
Jd-opensource joysafeter
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title JoySafeter through 1.0.0 Authenticated RCE via Copilot Standard Mode Shell
Weaknesses CWE-653
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 8.7, 'vector': '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Oct 22, 2026, 9:04 PM
Reserved
Oct 12, 2026, 3:52 PM
Status
Deferred
Published
Oct 20, 2026, 1:17 AM
Modified
Oct 20, 2026, 8:11 PM