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CVE-2026-12957 and CVE-2026-12958 - Issues in Language Servers for AWS and Amazon Q Developer Plugins

Bulletin ID: 2026-047-AWS
Scope: AWS
Content Type: Important (requires attention)
Publication Date: 06/23/2026 09:00 AM PDT

Description:

Language Servers for AWS provide the underlying language-server runtime that powers Amazon Q Developer's AI coding assistance across its IDE plugins (Visual Studio Code, JetBrains, Eclipse, and Visual Studio).

We identified CVE-2026-12957, an improper trust boundary enforcement issue in Language Servers for AWS before version 1.65.0. If a local user opens a maliciously crafted workspace, any commands within the project configuration files may be automatically executed. This issue requires the user to trust the workspace when prompted.

We identified CVE-2026-12958, a missing symlink-validation issue in Language Servers for AWS before version 1.69.0. This may occur when a local user opens a workspace with a maliciously crafted symlink that resolves to a file path outside the workspace trust boundary.

These issues affect the Amazon Q Developer IDE plugins, which bundle Language Servers for AWS. Both issues are remediated in Language Servers for AWS version 1.69.0.

Affected products & versions:

  • Language Servers for AWS: < 1.69.0
  • Amazon Q Developer for Visual Studio Code: < 2.20
  • Amazon Q Developer for JetBains: < 4.3
  • Amazon Q Developer for Eclipse: < 2.7.4
  • AWS Toolkit with Amazon Q for Visual Studio: < 1.94.0.0

Resolution:

These issues have been addressed in Language Servers for AWS version 1.69.0 and the corresponding Amazon Q Developer plugin releases that bundle it. We recommend upgrading to the latest version of your Amazon Q Developer IDE plugin, and ensuring any forked or derivative code is patched to incorporate the new fixes.

Workarounds:

No workarounds are available.

References:

Acknowledgement:

We would like to thank Wiz for collaborating on this issue through the coordinated vulnerability disclosure process.


Please email aws-security@amazon.com with any security questions or concerns.