CVE-2026-49471
Description
Serena is a powerful MCP toolkit for coding that provides semantic retrieval and editing capabilities. Prior to v1.5.2, Serena's built-in web dashboard exposes an unauthenticated Flask API on a fixed, predictable port, with no authentication, no CSRF protection, and no Host header validation. A DNS rebinding attack allows a malicious webpage to reach this API from any browser and write arbitrary content to the agent's persistent memory store, which the agent reads and acts on autonomously. Combined with execute_shell_command using shell=True, this creates a remote code execution chain requiring only that the victim visit a malicious webpage while Serena is running. This issue is fixed in version v1.5.2.
How to fix
- oraios-ai serena1.5.2 or later
- serena-agent1.5.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| oraios-ai serena | v < 1.5.2 | 1.5.2 |
| serena-agentPyPI | v < 1.5.2 | 1.5.2 |
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Attack Surface Management
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