Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Oraios-Ai | Serena | < 1.5.2 |
Related Weaknesses (CWE)
References
- https://github.com/oraios/serena/commit/016ccbe1c095a3eed7967737ac1d4df2754f5d96Patch
- https://github.com/oraios/serena/releases/tag/v1.5.2Release Notes
- https://github.com/oraios/serena/security/advisories/GHSA-37h2-6p4f-mp3qExploitThird Party Advisory
FAQ
What is CVE-2026-49471?
CVE-2026-49471 is a vulnerability with a CVSS score of 8.3 (HIGH). 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,...
How severe is CVE-2026-49471?
CVE-2026-49471 has been rated HIGH with a CVSS base score of 8.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-49471?
Check the references section above for vendor advisories and patch information. Affected products include: Oraios-Ai Serena.