CVE-2026-49471
CVE-2026-49471 · Serena: Unauthenticated Flask dashboard on fixed port enables DNS rebinding → memory poisoning → RCE
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 8.3 · High · EPSS 0.4% · Fix available
- Published
- Updated
Stack: python
Affected products and versions
serena
- Versions
- < 1.5.2: Affected
No fix published
serena-agent PyPI
- Versions
- 0.1.3
- 0.1.4
- 1.0.0
- 1.1.0
- 1.1.1
- 1.1.2
- 1.2.0
- 1.3.0
- 1.5.0
- 1.5.1
- Affected ranges
- ECOSYSTEM: < 1.5.2
Update to 1.5.2