CVE-2026-40376 is a vulnerability in Microsoft Visual Studio Code identified as improper input validation (CWE-20). This security flaw enables an attacker without privileges to elevate their privileges remotely over a network. The vulnerability has a CVSS 3.1 base score of 7.5, indicating high severity with high impact on confidentiality, integrity, and availability. Microsoft has released an official fix to remediate this issue. There are no reports of active exploitation in the wild.

Successful exploitation of this vulnerability could allow an unauthorized attacker to gain elevated privileges on the affected system, potentially leading to full compromise of the Visual Studio Code environment and associated resources. The impact includes high confidentiality, integrity, and availability loss as indicated by the CVSS score.

An official fix is available from Microsoft to address this vulnerability. Users and administrators should apply the patch promptly to mitigate the risk. Since this is not a cloud service, remediation requires updating the affected Visual Studio Code installations. No additional mitigation steps are indicated by the vendor advisory.