CVE-2026-109443CWE-653

CVE-2026-109443

High · published October 20, 2026

CVSS v3.1
8.8
EPSS
1%
Percentile
52.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
8.7 · 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
EPSS
0.00705 · 52.8th percentile
Weakness
CWE-653 · Improper Isolation or Compartmentalization
Published
2026-10-20T05:17Z
References (4)
https://github.com/jd-opensource/JoySafeter/blob/12234a11a9d96acef85577afb1fa5682169d6171/backend/app/core/agent/backends/utils/command_executor.py#L110 · [email protected]https://github.com/jd-opensource/JoySafeter/blob/12234a11a9d96acef85577afb1fa5682169d6171/backend/app/services/copilot_service.py#L106 · [email protected]https://www.lasso.security/vulnerability-database/cve-2026-109443 · [email protected]https://www.vulncheck.com/advisories/joysafeter-through-1.0.0-authenticated-rce-via-copilot-standard-mode-shell · [email protected]
EPSS history
Timeline
  • 21 OCT 03:27Z
    EPSS moved — → 1%
    epss
  • 20 OCT 00:46Z
    JoySafeter through 1.0.0 Authenticated RCE via Copilot Standard Mode Shell
    cvelistv5
  • 20 OCT 00:46Z
    JoySafeter through 1.0.0 Authenticated RCE via Copilot Standard Mode Shell
    cvelistv5