CVE-2026-41611

Local code execution via oversized webview buffer

Published May 12, 2026 · Updated May 12, 2026

Code execution in Microsoft Visual Studio Code before 1.119.1 allows attackers to run code locally through a webview with untrusted content. WebviewProtocolProvider passes the backing ArrayBuffer instead of the correctly sized file-data view, allowing unintended bytes to enter root webview content. Exploitation requires user interaction to open an affected webview, after which untrusted script runs inside the webview and enables local code execution.

CVSS severity7.8
High
EPSS probability0.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Code execution in Microsoft Visual Studio Code before 1.119.1 allows attackers to run code locally through a webview with untrusted content. WebviewProtocolProvider passes the backing ArrayBuffer instead of the correctly sized file-data view, allowing unintended bytes to enter root webview content. Exploitation requires user interaction to open an affected webview, after which untrusted script runs inside the webview and enables local code execution.

The record

CVE
CVE-2026-41611
Published
May 12, 2026
Updated
May 12, 2026
Vendor
Microsoft
Product
Visual Studio Code
Classifications
CWE-79, CWE-77, CWE-80, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 12, 2026CVE publishedPublication date reported by the CVE source.
  2. May 12, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.0.0 <1.119.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Microsoft · Visual Studio Codeversion=1.0.0 <1.119.1

Published CVSS scores

7.8Microsoft CorporationCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
3.3NISTCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
CWE-80Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo