# CVE-2026-41109: Microsoft Visual Studio and GitHub Copilot Injection Vulnerability

Source: https://junglewise.ai/threats/cve-2026-41109-microsoft-visual-studio-and-github-copilot-injection  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-05-12. Updated: 2026-07-14  
License: CC BY 4.0 with a link back

CVE-2026-41109 · Severity: high · CVSS 8.8 · Published 2026-05-12

GitHub Copilot and Visual Studio Code are widely used development tools that assist engineers in writing and managing code. A security vulnerability in these tools could allow an attacker to bypass security protections by injecting malicious data through the network. If exploited, this could lead to unauthorized access to sensitive source code, data theft, or the compromise of the developer's workstation.

Technologies: [Microsoft Visual Studio](https://junglewise.ai/threats/technologies/visual-studio), [Microsoft Visual Studio Code](https://junglewise.ai/threats/technologies/visual-studio-code). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-41109 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-41109 being exploited in the wild.

**How severe is CVE-2026-41109?** High severity, with a CVSS score of 8.8, published 12 May 2026.

**Which products and versions are affected?** Microsoft Visual Studio Code < 1.128.1.

**Is there a fix for CVE-2026-41109?** A patch was published on 2026-07-14: Updated version information provided for Visual Studio Code Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-41109 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-41109?** Check whether you run Microsoft Visual Studio or Microsoft Visual Studio Code at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A downstream injection vulnerability (CWE-74) exists in GitHub Copilot and Visual Studio Code due to improper neutralization of special elements in output. An unauthenticated attacker can exploit this over the network, though it requires some level of user interaction (UI:R). The flaw allows an attacker to bypass security features, potentially leading to a total loss of confidentiality, integrity, and availability on the affected system. Microsoft has addressed the issue in Visual Studio Code, with versions prior to 1.128.1 being noted as affected in updated advisories.

## Affected products

- Microsoft Visual Studio Code < 1.128.1
- GitHub GitHub Copilot All versions prior to fix

## Timeline

- 2026-05-12: disclosed
- 2026-05-12: advisory: Initial advisory published by Microsoft
- 2026-07-14: patched: Updated version information provided for Visual Studio Code

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-41109](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-41109)

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