CVE-2026-81835 | RooCodeInc Roo-Code up to 3.51.1 MCP Integration Trust Model malicious_mcp_server.py fetch_instructions code injection

August 27, 2026 Yanac

A vulnerability identified as problematic has been detected in RooCodeInc Roo-Code up to 3.51.1. This affects the function fetch_instructions of the file malicious_mcp_server.py of the component MCP Integration Trust Model. The manipulation leads to code injection. This vulnerability only affects products that are no longer supported by the maintainer.

This vulnerability is uniquely identified as CVE-2026-81835. The attack is possible to be carried out remotely. Moreover, an exploit is present.

Multiple isses were reported to the vendor beforehand. They explain, that “they all apply to Roo Code, a project we no longer support – the repository was archived a while ago, and we don’t encourage anyone to use it.”VulDB Recent EntriesRead More