CVE-2026-59726 Ruflo: Unauthenticated RCE in MCP bridge default docker-compose deployment
Unauthenticated attackers can execute arbitrary commands and read API keys via exposed MCP bridge endpoints in Ruflo's default Docker deployment.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-59726?
CVE-2026-59726 is a critical command injection vulnerability in ruvnet ruflo, published on 9 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Ruflo is an agent meta-harness for Claude Code and Codex. Prior to 3.16.3, ruflo's default docker-compose deployment exposed the MCP bridge POST /mcp and POST /mcp/:group endpoints without authentication, allowing an unauthenticated network attacker to invoke tools/call to terminal_execute, obtain a shell in the bridge container, read provider API keys, and poison AgentDB learning-store patterns. This issue is fixed in version 3.16.3.
Which versions are affected by CVE-2026-59726?
How do I fix CVE-2026-59726?
No fix has been published for CVE-2026-59726 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-2026-59726 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-59726 exists.
Public exploit code: 1 Nuclei template and 1 proofs of concept on GitHub.
Sources
Also known as GHSA-c4hm-4h84-2cf3.