EUVD-2026-42077
GHSA-37h2-6p4f-mp3q
Severity by source
AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
Primary rating from Vendor (GitHub_M) · only source for this CVE.
CVSS VectorVendor: GitHub_M
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
Lifecycle Timeline
3DescriptionCVE.org
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.
Articles & Coverage 1
AnalysisAI
Remote code execution in the Oraios Serena MCP coding toolkit (prior to v1.5.2) lets a malicious webpage hijack a developer's local coding agent via DNS rebinding. Serena's built-in web dashboard runs an unauthenticated Flask API on a fixed, predictable port with no auth, no CSRF protection, and no Host-header validation, so any site the victim visits while Serena is running can write attacker-controlled content into the agent's persistent memory store; because the agent autonomously reads that memory and can invoke execute_shell_command with shell=True, this chains to code execution on the developer's machine. …
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Within 24 hours: Disable Oraios Serena's web dashboard or isolate affected development machines from untrusted networks; contact Oraios for patch availability and timeline. …
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External POC / Exploit Code
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