CVE-2026-19515 Overview
CVE-2026-19515 is an operating system command injection vulnerability [CWE-78] in the WSO2 Integrator MI Visual Studio Code extension. The extension fails to sanitize or validate user-supplied input when processing Micro Integrator projects opened from untrusted sources. An attacker who convinces a developer to open a crafted project and trigger the unit test execution flow can inject and execute arbitrary OS commands. The commands run under the privileges of the user account executing VS Code. Exploitation requires the user to grant workspace trust to the malicious project before triggering unit tests.
Critical Impact
Successful exploitation results in arbitrary OS command execution on the developer workstation running the WSO2 Integrator MI VS Code extension, with impact scoped to the privileges of the VS Code user.
Affected Products
- WSO2 Integrator MI VS Code extension
- Micro Integrator project workflows using the extension's unit test execution feature
- Developer workstations running VS Code with the WSO2 Integrator MI extension installed
Discovery Timeline
- 2026-09-15 - CVE-2026-19515 published to the National Vulnerability Database
- 2026-09-15 - Last updated in NVD database
Technical Details for CVE-2026-19515
Vulnerability Analysis
The WSO2 Integrator MI VS Code extension processes project metadata and unit test configuration data from files bundled inside a Micro Integrator project. When a developer opens such a project and initiates the unit test execution flow, the extension incorporates attacker-controlled fields from the project into shell commands. Because the extension does not validate or escape these fields, an attacker can embed shell metacharacters or additional commands that the underlying shell interprets and executes.
Exploitation is local and requires user interaction. The victim must open the untrusted project, grant workspace trust, and manually invoke the unit test action. Once triggered, the injected commands execute with the same privileges as the VS Code process, enabling arbitrary code execution, credential theft, source code exfiltration, or lateral movement from the developer host.
Root Cause
The root cause is improper neutralization of special elements used in an OS command [CWE-78]. Project-supplied strings are concatenated into shell command lines used to launch the unit test runner without input validation or safe process invocation APIs.
Attack Vector
The attack vector is local with high attack complexity and requires user interaction. An attacker distributes a malicious Micro Integrator project through a repository, archive, or supply-chain channel. When the developer opens the project in VS Code, grants workspace trust, and runs unit tests, the injected OS commands execute on the workstation.
No verified public exploit code is available. See the WSO2 Security Advisory WSO2-2026-5854 for vendor technical details.
Stop Remote Code Execution Before It Runs
Singularity™ Endpoint detects and blocks exploit attempts at machine speed, including zero-days and novel attack techniques.
Stop Exploit AttemptsDetection Methods for CVE-2026-19515
Indicators of Compromise
- Unexpected child processes spawned by the VS Code process (Code.exe, code) or by Node.js host processes associated with the WSO2 Integrator MI extension shortly after opening a project.
- Shell interpreters (cmd.exe, powershell.exe, /bin/sh, /bin/bash) launched with command lines containing content derived from Micro Integrator project files.
- Outbound network connections from developer workstations to unknown hosts immediately following unit test execution in the WSO2 extension.
Detection Strategies
- Hunt for VS Code or Node.js processes spawning shells with command lines that reference project paths and contain shell metacharacters such as ;, &&, |, or backticks.
- Correlate workspace trust prompts with subsequent process creation events in EDR telemetry to identify suspicious project executions.
- Review VS Code extension logs and shell history on developer hosts for unit test invocations that produced unexpected command output.
Monitoring Recommendations
- Enable process creation logging (Sysmon Event ID 1 on Windows, execve auditing on Linux, Endpoint Security on macOS) on developer workstations.
- Alert on installations or updates of the WSO2 Integrator MI VS Code extension to track exposure across the developer fleet.
- Monitor developer endpoints for outbound connections to non-corporate destinations following project open or unit test events.
How to Mitigate CVE-2026-19515
Immediate Actions Required
- Update the WSO2 Integrator MI VS Code extension to the fixed version identified in the vendor advisory.
- Instruct developers not to grant workspace trust to Micro Integrator projects from untrusted or unverified sources.
- Audit developer workstations for the presence and version of the WSO2 Integrator MI extension and prioritize remediation on hosts with elevated privileges.
Patch Information
WSO2 has published remediation guidance in WSO2 Security Advisory WSO2-2026-5854. Apply the fixed extension version referenced in that advisory. Restart VS Code after updating to ensure the patched extension is loaded.
Workarounds
- Open unknown Micro Integrator projects only in VS Code Restricted Mode and do not grant workspace trust until the project is reviewed.
- Avoid executing the unit test flow on any project sourced from external contributors, forks, or attachments until it has been inspected for suspicious build or test configuration entries.
- Run VS Code under a least-privilege user account without administrative rights to limit the impact of successful command injection.
# Verify installed extension version and update to the patched release
code --list-extensions --show-versions | grep -i wso2
code --install-extension WSO2.micro-integrator --force
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
