CVE-2026-47284 Overview
CVE-2026-47284 is an information disclosure vulnerability affecting Microsoft Visual Studio Code. The flaw allows an unauthorized attacker to disclose sensitive information over a network when a user interacts with attacker-controlled content. The weakness is classified under [CWE-200] (Exposure of Sensitive Information to an Unauthorized Actor). Exploitation requires user interaction but does not require prior authentication, expanding the population of potentially affected developers and engineering organizations using Visual Studio Code as their primary integrated development environment (IDE).
Critical Impact
A successful attack discloses sensitive information from the Visual Studio Code environment to a remote, unauthenticated attacker, potentially exposing source code, tokens, or local file contents handled by the editor.
Affected Products
- Microsoft Visual Studio Code
- Visual Studio Code extensions and workspaces processing untrusted content
- Developer endpoints running vulnerable Visual Studio Code builds
Discovery Timeline
- 2026-06-09 - CVE-2026-47284 published to the National Vulnerability Database (NVD)
- 2026-06-09 - Last updated in NVD database
Technical Details for CVE-2026-47284
Vulnerability Analysis
The vulnerability stems from improper handling of sensitive data within Visual Studio Code, classified as [CWE-200]. An unauthorized attacker can craft network-reachable content that, once interacted with by a victim, causes the editor to expose information that should remain confined to the local environment. Confidentiality impact is rated high, while integrity and availability remain unaffected, indicating the flaw is purely a disclosure issue rather than a code execution or tampering primitive. The Microsoft security advisory for this CVE provides the authoritative product and build matrix. See the Microsoft CVE-2026-47284 Advisory for vendor-confirmed details.
Root Cause
The root cause is exposure of sensitive information to an unauthorized actor within Visual Studio Code components. The editor processes data in a way that allows attacker-controlled inputs to retrieve or echo content the attacker should not have access to over the network. The exact internal component remains documented only in Microsoft's advisory.
Attack Vector
The attack vector is network-based and requires user interaction. A typical exploitation path involves a developer opening a malicious workspace, repository, file, or URI within Visual Studio Code. Once interaction occurs, the editor performs an action that leaks sensitive information back to the attacker-controlled endpoint. No privileges or prior authentication are required from the attacker side.
No verified public proof-of-concept code is available for CVE-2026-47284 at the time of publication. Refer to the Microsoft Security Response Center advisory for technical details and updated guidance.
Detection Methods for CVE-2026-47284
Indicators of Compromise
- Outbound HTTP or HTTPS connections from Code.exe or code processes to unrecognized, low-reputation domains shortly after a workspace is opened.
- Visual Studio Code reading sensitive files such as .env, SSH keys, or credential stores immediately followed by network egress.
- Unexpected DNS queries originating from developer endpoints correlated to repository clone or workspace open events.
Detection Strategies
- Hunt for anomalous child processes and outbound connections originating from Visual Studio Code after the user opens new repositories or remote URIs.
- Correlate file access telemetry on sensitive paths with subsequent network activity from the editor process.
- Inventory Visual Studio Code versions across the fleet and flag endpoints running builds released before the vendor patch.
Monitoring Recommendations
- Enable endpoint detection and response (EDR) telemetry on developer workstations to record process, file, and network events for IDE binaries.
- Forward developer endpoint logs into a centralized analytics platform such as a SIEM or data lake to support cross-host hunting.
- Alert on Visual Studio Code processes initiating connections to domains outside an approved allowlist of Microsoft, GitHub, and internal infrastructure.
How to Mitigate CVE-2026-47284
Immediate Actions Required
- Update Visual Studio Code to the latest version published by Microsoft addressing CVE-2026-47284.
- Audit installed extensions and remove any that are unmaintained, unverified, or unnecessary on developer endpoints.
- Instruct developers to avoid opening untrusted repositories, workspaces, or files outside Workspace Trust until patching is complete.
Patch Information
Microsoft has published an advisory for this issue. Apply the updated Visual Studio Code build referenced in the Microsoft CVE-2026-47284 Advisory. Enable automatic updates within Visual Studio Code to ensure timely receipt of future security fixes.
Workarounds
- Enable Visual Studio Code Workspace Trust and restrict execution of code and tasks from untrusted folders.
- Block outbound network access from developer workstations to non-business domains using DNS filtering or egress firewall rules.
- Store secrets in dedicated secret managers rather than local workspace files to limit the value of any disclosure.
# Verify installed Visual Studio Code version and update
code --version
code --update-extensions
# On Windows, trigger update check: Help > Check for Updates
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
