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OpenAdvisories
High · 7.3 CVE-2026-33881 EUVD-2026-16820

Windmill: Rogue Workspace Admins can inject code via unescaped workspace environment variable interpolation in NativeTS executor

Published Mar 27, 2026 · Updated Apr 1, 2026 · Assigned by GitHub_M

Description

Windmill is an open-source developer platform for internal code: APIs, background jobs, workflows and UIs. Workspace environment variable values are interpolated into JavaScript string literals without escaping single quotes in the NativeTS executor. A workspace admin who sets a custom environment variable with a value containing `'` can inject arbitrary JavaScript that executes inside every NativeTS script in that workspace. This is a code injection bug in `worker.rs`, not related to the sandbox/NSJAIL topic. Version 1.664.0 patches the issue.

Affected products

VendorProductAffectedFixed
windmill-labs windmill < 1.664.0 —

References