CVE-2026-119085

Summary

A template injection flaw (CWE-1336) in Amazon VEW's publishing component allows authenticated attackers to inject and execute arbitrary code via crafted CloudFormation templates, gaining the Lambda's IAM role permissions and compromising all tenant data.

Exploitability

Exploitation requires valid authentication and access to the versioning API, but is otherwise straightforward due to lack of input sanitization in the template engine.

Blast radius

An attacker can fully compromise any tenant’s data and infrastructure by leveraging the compromised Lambda’s IAM role across all projects.

Detection

Monitor CloudFormation template submission logs for unexpected or non-standard template directives (e.g., Fn::Sub, !Ref, or custom macros) in user-provided template bodies; alert on repeated or anomalous versioning API calls from low-privilege accounts.

Prioritized remediation

Redeploy Amazon VEW from the latest version of awslabs/virtual-engineering-workbench.

Analysis generated locally by garnet-coder (no data left the box). AI-assisted — verify against primary sources before acting.