CVE-2026-49471
Serena is a powerful MCP toolkit for coding that provides semantic retrieval and editing capabilities.
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | serena-agent | < 1.5.2 | 1.5.2 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Oraios-Ai | Serena | before 1.5.2 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-37h2-6p4f-mp3q
- https://github.com/oraios/serena/security/advisories/GHSA-37h2-6p4f-mp3q
- https://nvd.nist.gov/vuln/detail/CVE-2026-49471
- https://github.com/oraios/serena/commit/016ccbe1c095a3eed7967737ac1d4df2754f5d96
- https://github.com/oraios/serena/releases/tag/v1.5.2