CVE-2026-109443
JoySafeter through 1.0.0 Authenticated RCE via Copilot Standard Mode Shell
No known exploitation. EPSS puts it in the 58th percentile. No fix published yet.
What to do
No fixed build or workaround is published yet. Limit exposure and watch for a patch.
- jd-opensource JoySafeterAffected: ≤ 1.0.0Upgrade to: after 1.0.0Stated by: CVE record
Versions as the sources state them. Full version matrix after sign-in
Steps
Written by AI from the record- Check whether your organization runs JoySafeter version 1.0.0 or earlier.
- Restrict who can register or log in as a user, since any authenticated account can trigger this issue.
- Disable or avoid using Copilot's Standard Mode chat feature until a fix is released.
- Contact the JoySafeter vendor to confirm a patched version and timeline, since no fix is currently published.
- Once a fixed version is released, upgrade immediately and review logs for unusual command activity.
What it is
From the CVE record
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.
In plain language
Written by AI from the recordJoySafeter, an AI-assistant/chat tool, has a flaw that lets any logged-in user trick its Copilot feature into running commands on the server, potentially exposing other customers' data — there's no fix yet, so businesses using it should limit access and watch for a patch.
Authenticated users of JoySafeter (through 1.0.0) can achieve remote code execution by selecting Copilot's Standard Mode in the WebSocket chat.start extension, which invokes an unsandboxed execute tool (subprocess.run with shell=True), enabling cross-tenant data access and server secret disclosure (CWE-653: insufficient compartmentalization).
If you're affected
- Cross-tenant data exposure
- Server secrets stolen
- Full server compromise
- Operational disruption
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Not in the catalog. CISA has not confirmed exploitation.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
0.9% chance of exploitation activity in the next 30 days, which ranks it in the 58th percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
- Attention now
Sustained, driven by wide press coverage.
Lifecycle
5 events over 0 days, from the signal feeds we watch.
- Publishedweakness classified, record updated, record updated, record updated
Affected products
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Scored 8.8 by NVD.
How it is reached
- Attack Vector NetworkExploitable remotely over the network without any special conditions
- Attack Complexity LowNo special conditions — the attack can be reliably reproduced
- Privileges Required LowRequires basic user-level privileges
- User Interaction NoneNo user interaction needed — fully automated exploitation
Scope
- Scope UnchangedImpact is limited to the vulnerable component itself
Impact if exploited
- Confidentiality HighTotal information disclosure — all data in the component is compromised
- Integrity HighTotal loss of integrity — attacker can modify any data in the component
- Availability HighTotal denial of service — the component is completely unavailable
Weaknesses
Sources
References in the record
- lasso.security/vulnerability-database/cve-2026-109443
- github.com/jd-opensource/JoySafeter/blob/12234a11a9d96acef85577afb1fa5682169d6171/backend/app/core/agent/backends/utils/command_executor.py
- github.com/jd-opensource/JoySafeter/blob/12234a11a9d96acef85577afb1fa5682169d6171/backend/app/services/copilot_service.py
And 1 more reference. See all after sign-in
In the news
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