CVE-2026-59113: Visual Studio Code RCE Vulnerability

CVE-2026-59113 Overview

CVE-2026-59113 is a missing authorization vulnerability in Microsoft Visual Studio Code. An unauthorized attacker can execute code over a network by exploiting the missing authorization check [CWE-862]. The flaw requires user interaction to succeed, and successful exploitation yields high impact to confidentiality, integrity, and availability. Microsoft published the advisory on August 11, 2026.

Critical Impact
Remote attackers can execute arbitrary code on developer workstations running vulnerable Visual Studio Code builds after tricking a user into a single interaction.

Affected Products

Microsoft Visual Studio Code
Visual Studio Code extensions dependent on the affected authorization component
Developer environments integrating Visual Studio Code workflows

Discovery Timeline

2026-08-11 - CVE-2026-59113 published to the National Vulnerability Database (NVD)
2026-08-12 - Last updated in NVD database

Technical Details for CVE-2026-59113

Vulnerability Analysis

The vulnerability originates from a missing authorization check within Visual Studio Code, classified under [CWE-862]. Visual Studio Code exposes network-reachable functionality that fails to validate whether the caller is permitted to invoke privileged operations. An unauthorized remote actor can reach the affected code path and trigger execution logic that should be restricted to trusted principals.

Exploitation results in arbitrary code execution in the context of the Visual Studio Code process. Because the editor typically runs with the interactive user's privileges, attackers gain the ability to read source code, modify files, and pivot into connected repositories or cloud services. The attack requires user interaction, meaning the victim must open a crafted resource, accept a prompt, or engage with attacker-supplied content.

Root Cause

The root cause is an authorization decision that is either absent or improperly enforced before a sensitive operation runs. Visual Studio Code accepts requests without verifying the identity or permissions of the requester. This gap allows callers from outside the intended trust boundary to reach code execution primitives that the product assumed only authorized components could invoke.

Attack Vector

The attack vector is network-based with low complexity and no privileges required, but the attacker must convince a user to perform an action. Typical scenarios involve a victim opening a malicious workspace, clicking a link, or interacting with attacker-controlled content that reaches the unauthorized endpoint. Refer to the Microsoft Vulnerability Advisory for vendor-supplied technical detail.

// No verified public proof-of-concept code is available for CVE-2026-59113.
// Refer to the Microsoft Security Response Center advisory for authoritative detail.

Detection Methods for CVE-2026-59113

Indicators of Compromise

Unexpected child processes spawned by Code.exe or the Visual Studio Code helper processes on developer workstations.
Outbound network connections from Visual Studio Code to untrusted hosts immediately after opening a workspace or link.
New or modified files under user profile directories that correlate with Visual Studio Code activity but were not initiated by the user.

Detection Strategies

Monitor endpoint telemetry for Visual Studio Code processes launching shells, scripting engines, or powershell.exe without a legitimate task binding.
Correlate workspace-open events with subsequent outbound HTTP or WebSocket traffic from the editor process.
Alert on Visual Studio Code writing to autorun locations, scheduled task stores, or credential files.

Monitoring Recommendations

Ingest endpoint process, file, and network telemetry into a centralized data lake for retrospective hunting on Visual Studio Code activity.
Track Visual Studio Code version inventory across the fleet to identify hosts still running vulnerable builds.
Review extension installation events, since extensions can widen the attack surface of the affected component.

How to Mitigate CVE-2026-59113

Immediate Actions Required

Update Visual Studio Code to the fixed release identified in the Microsoft Vulnerability Advisory.
Restart all Visual Studio Code instances after patching to ensure the vulnerable process is terminated.
Audit developer workstations for signs of exploitation using the indicators listed above.

Patch Information

Microsoft has published guidance for CVE-2026-59113 through the Microsoft Security Response Center. Apply the vendor-supplied update through the built-in Visual Studio Code updater or the enterprise deployment channel used in your environment. Consult the Microsoft Vulnerability Advisory for build numbers and release notes.

Workarounds

Restrict Visual Studio Code from opening untrusted workspaces by enforcing Workspace Trust policies.
Block outbound network access from developer workstations to untrusted destinations at the egress perimeter until patches are applied.
Educate developers to avoid clicking links or opening repositories from unverified sources while the vulnerability is unpatched.

bash

# Verify installed Visual Studio Code version and enforce Workspace Trust
code --version
code --list-extensions --show-versions

# Enforce Workspace Trust via settings.json
# "security.workspace.trust.enabled": true,
# "security.workspace.trust.startupPrompt": "always",
# "security.workspace.trust.untrustedFiles": "prompt"