CVE-2026-109443 JoySafeter through 1.0.0 Authenticated RCE via Copilot Standard Mode Shell

High 8.7 Published 20 Oct 2026 Updated 22 Oct 2026

Exploited in the wild: Not known
Fix: None listed

What is CVE-2026-109443?

CVE-2026-109443 is a high-severity vulnerability in jd-opensource JoySafeter, published on 20 Oct 2026.

Official 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.

Weakness: CWE-653

Which versions are affected by CVE-2026-109443?

How do I fix CVE-2026-109443?

No fix has been published for CVE-2026-109443 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-109443 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-109443 exists.

Sources

Also known as GHSA-qmmc-575c-v2h8.