CVE-2026-3959 0xKoda WireMCP Tshark CLI index.js server.tool os command injection
Local attackers can execute arbitrary OS commands via the Tshark CLI handler in the WireMCP library, requiring immediate attention from users of this MCP server.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-3959?
CVE-2026-3959 is a medium-severity command injection vulnerability in 0xKoda WireMCP, published on 11 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability was found in 0xKoda WireMCP up to 7f45f8b2b4adeb76be8c6227eefb38533fdd6b1e. Impacted is the function server.tool of the file index.js of the component Tshark CLI Command Handler. The manipulation results in os command injection. The attack needs to be approached locally. The exploit has been made public and could be used. This product utilizes a rolling release system for continuous delivery, and as such, version information for affected or updated releases is not disclosed. The project was informed of the problem early through an issue report but has not responded yet.
Which versions are affected by CVE-2026-3959?
How do I fix CVE-2026-3959?
No fix has been published for CVE-2026-3959 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-3959 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-3959 exists.
Sources
Also known as GHSA-v6jp-f2qq-3m24.