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

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.0$0-$5k2.42

Summaryinfo

A vulnerability labeled as problematic has been found in RooCodeInc Roo-Code up to 3.51.1. This vulnerability affects the function fetch_instructions of the file malicious_mcp_server.py of the component MCP Integration Trust Model. The manipulation results in code injection. This vulnerability only affects products that are no longer supported by the maintainer. This vulnerability was named CVE-2026-81835. The attack may be performed from remote. In addition, an exploit is available. 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."

Detailsinfo

A vulnerability was found in RooCodeInc Roo-Code up to 3.51.1. It has been classified as problematic. Affected is the function fetch_instructions of the file malicious_mcp_server.py of the component MCP Integration Trust Model. The manipulation with an unknown input leads to a code injection vulnerability. CWE is classifying the issue as CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. This is going to have an impact on confidentiality, integrity, and availability.

The advisory is shared for download at gist.github.com. This vulnerability is traded as CVE-2026-81835. The exploitability is told to be easy. It is possible to launch the attack remotely. Successful exploitation requires user interaction by the victim. Technical details and a public exploit are known. The MITRE ATT&CK project declares the attack technique as T1059.

The exploit is shared for download at gist.github.com. It is declared as proof-of-concept. 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."

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

Name

Version

Support

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.0

VulDB Base Score: 5.5
VulDB Temp Score: 5.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Code injection
CWE: CWE-94 / CWE-74 / CWE-707
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

08/27/2026 Advisory disclosed
08/27/2026 +0 days VulDB entry created
08/27/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: gist.github.com
Status: Not defined

CVE: CVE-2026-81835 (🔒)
GCVE (CVE): GCVE-0-2026-81835
GCVE (VulDB): GCVE-100-396168
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 08/27/2026 16:54
Changes: 08/27/2026 16:54 (58)
Complete: 🔍
Submitter: tchen200311
Cache ID: 216::103

Submitinfo

Accepted

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