CVE-2026-5621 ChrisChinchilla Vale-MCP HTTP index.ts os command injection
Local attackers can execute arbitrary OS commands via the config_path argument in the Vale-MCP library's HTTP interface.
- 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-2026-5621?
CVE-2026-5621 is a medium-severity command injection vulnerability in ChrisChinchilla Vale-MCP, published on 6 Apr 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 ChrisChinchilla Vale-MCP up to 0.1.0. Affected by this vulnerability is an unknown functionality of the file src/index.ts of the component HTTP Interface. The manipulation of the argument config_path results in os command injection. Attacking locally is a requirement. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.
Which versions are affected by CVE-2026-5621?
How do I fix CVE-2026-5621?
No fix has been published for CVE-2026-5621 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-2026-5621 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-5621 exists.
Sources
Also known as GHSA-2j8h-v2cv-qh49.