Vulnerability Details CVE-2026-49471
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 14.8%
CVSS Severity
CVSS v3 Score 8.3
References
Products affected by CVE-2026-49471
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cpe:2.3:a:oraios-ai:serena:0.1.0
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cpe:2.3:a:oraios-ai:serena:0.1.1
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cpe:2.3:a:oraios-ai:serena:0.1.2
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cpe:2.3:a:oraios-ai:serena:0.1.3
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cpe:2.3:a:oraios-ai:serena:0.1.4
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cpe:2.3:a:oraios-ai:serena:1.0.0
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cpe:2.3:a:oraios-ai:serena:1.1.0
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cpe:2.3:a:oraios-ai:serena:1.1.1
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cpe:2.3:a:oraios-ai:serena:1.1.2
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cpe:2.3:a:oraios-ai:serena:1.2.0
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cpe:2.3:a:oraios-ai:serena:1.3.0
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cpe:2.3:a:oraios-ai:serena:1.5.0
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cpe:2.3:a:oraios-ai:serena:1.5.1