Medium 5.5Published Aug 27, 2026

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

Updated under an hour ago (2026-10-19 08:20 UTC)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for RooCodeInc Roo-Code

Exploited in the last 30 days

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: 5.5 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
Weakness (CWE): CWE-94, CWE-74
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulDB
NVD analysis: Deferred
Record last updated: Aug 28, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

RooCodeInc Roo-Code roocodeinc:roo-code	3.51.0; 3.51.1	CNA record

References

https://vuldb.com/vuln/396168vdb-entry, technical-description
https://vuldb.com/vuln/396168/ctisignature, permissions-required
https://vuldb.com/cve/CVE-2026-81835third-party-advisory
https://vuldb.com/submit/864286third-party-advisory
https://gist.github.com/tchen200311/05b5960272c290b7843d6bbdbfe9f7c1exploit

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.