Improper Trust Boundary Enforcement in Language Servers for AWS
CVE-2026-12957

8.5HIGH

Key Information:

Vendor: Amazon Web Services
Status: Language Servers For Aws
Vendor: CVE Published:; 23 June 2026

🔔 Create Amazon Web Services Vulnerability Alert

Badges

📈 Score: 1,490📰 News Worthy

What is CVE-2026-12957?

CVE-2026-12957 is a vulnerability affecting the Language Servers for AWS, a tool designed to provide language support for AWS development environments. This vulnerability arises from improper trust boundary enforcement, which can lead to arbitrary code execution when a local user opens a maliciously crafted workspace. If a user unwittingly trusts such a workspace, any commands embedded in the project's configuration files may automatically execute, potentially compromising the security of the user's system. The vulnerability affects versions prior to 1.65.0, emphasizing the importance of users upgrading to the recommended version to mitigate risks.

Potential impact of CVE-2026-12957

Arbitrary Code Execution: The primary impact of this vulnerability is the potential for attackers to execute arbitrary code on a victim's machine. This could allow for unauthorized actions and control, leading to further exploitation of the system.
Compromise of Sensitive Data: As malicious commands execute automatically upon trusting a workspace, there is a risk of exposing sensitive data stored on the affected machine, leading to data breaches and unauthorized access to information.
Increased Risk of Malware Deployment: The execution of harmful code may not only compromise the affected system but could also open avenues for deploying additional malware, escalating the threat level and potentially impacting broader organizational networks.