Code Injection Vulnerability in RooCodeInc Roo-Code Up to 3.51.1
CVE-2026-81835

5.1MEDIUM

Key Information:

Vendor

Roocodeinc

Status
Roo-code
Vendor
CVE Published:
27 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-81835?

A code injection vulnerability has been identified in the RooCodeInc Roo-Code application, specifically within the fetch_instructions function of the malicious_mcp_server.py file. This issue arises within the MCP Integration Trust Model and enables attackers to manipulate functions remotely, leading to unauthorized code execution. While multiple concerns regarding this vulnerability were brought to the vendor's attention, it is important to note that the product is no longer actively supported and has been archived. Users relying on affected versions should take immediate action to mitigate risks, as exploits for this vulnerability are publicly known.

Affected Version(s)

Roo-Code 3.51.0

Roo-Code 3.51.1

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-81835 - Proof of Concept

References

https://vuldb.com/vuln/396168
vdb-entrytechnical-description
https://vuldb.com/vuln/396168/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-81835
third-party-advisory

CVSS V4

Score:
5.1
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

tchen200311 (VulDB User)
VulDB CNA Team
.