CVE-2026-81835mediumCWE-74CWE-94

CVE-2026-81835: medium-severity vulnerability in RooCodeInc Roo-Code

RooCodeInc Roo-Code MCP Integration Trust Model malicious_mcp_server.py fetch_instructions code injection

Published · Updated

Follow this CVE+ Monitor Roo-Code

E-mail alert when it lands in KEV, gets a public PoC or its score goes up.

33Vexday Risk Score

No sign of exploitation. It has a public proof of concept.

ssvc Attendcvss 5.1epss 0.3%
A security vulnerability 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. The attack is possible to be carried out remotely. The exploit has been disclosed publicly and may be used. 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." This vulnerability only affects products that are no longer supported by the maintainer.
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
Affected products
RooCodeInc · Roo-Code
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
Related CVEs — RooCodeInc Roo-Code

In the same product, most dangerous first.

CVE-2026-63108HIGHRoo Code 3.54.0 Command Injection via Parameter Expansion ParsingEPSS 1.8%CVE-2025-58371CRITICALRoo Code is vulnerable to command injection via GitHub actions workflowEPSS 1.5%CVE-2025-54377HIGHRoo Code Lacks Line Break Validation in its Command Execution ToolEPSS 1.1%CVE-2025-53536HIGHRoo Code allows Potential Remote Code Execution via .vscode/settings.jsonEPSS 0.8%CVE-2025-57771HIGHRoo-Code potential remote code execution via auto-execute command parsing flawEPSS 0.7%CVE-2025-65946HIGHRoo Code is Vulnerable to Potential Remote Code Execution via zsh Command Validation BugEPSS 0.7%