EUVD-2026-42656Severity by source
AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Default docker-compose exposes an unauthenticated shell endpoint (AV:N/AC:L/PR:N/UI:N); container escape to provider keys and AgentDB justifies S:C with full C/I/A impact.
Primary rating from Vendor (github).
CVSS VectorVendor: github
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Lifecycle Timeline
3DescriptionCVE.org
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.
Articles & Coverage 1
AnalysisAI
Unauthenticated remote code execution in Ruflo (an agent meta-harness for Claude Code and Codex) before 3.16.3 arises because the default docker-compose deployment exposes the MCP bridge's POST /mcp and POST /mcp/:group endpoints with no authentication. A network attacker can send a JSON-RPC tools/call to the terminal_execute tool to gain an interactive shell inside the bridge container, exfiltrate provider API keys, and tamper with AgentDB learning-store patterns. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The specific prerequisite is that Ruflo is deployed via its default docker-compose configuration, which publishes the MCP bridge POST /mcp and POST /mcp/:group endpoints to the network without authentication; the exposed terminal_execute tool is the concrete feature abused. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | All available signals point to genuine, high-priority risk rather than a paper-high CVSS. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker scans for exposed Ruflo bridge ports and sends a single crafted JSON-RPC POST to /mcp invoking tools/call for terminal_execute with a shell command - no credentials or user interaction required. This yields command execution inside the bridge container, which the attacker uses to read provider API keys from the environment and to write malicious entries into the AgentDB learning store so future agent runs are subverted. … |
| Remediation | Vendor-released patch: 3.16.3 - upgrade Ruflo to v3.16.3 or later, which is the authoritative fix per the GitHub advisory GHSA-c4hm-4h84-2cf3 (see https://github.com/ruvnet/ruflo/releases/tag/v3.16.3 and PR https://github.com/ruvnet/ruflo/pull/2521). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Immediately network-isolate the /mcp and /mcp/:group endpoints or place behind reverse proxy with authentication; review container access logs for suspicious POST requests to these endpoints. …
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External POC / Exploit Code
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