CVE-2026-33881
High
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.
SeverityHigh
CVSS7.2
Exploit probability—
ProductWindmill
PublishedMar 27, 2026
First seenMar 27, 2026
Weakness typeCWE-94Code injection
How to fix
Update
- windmill windmill1.664.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| windmill windmill | v < 1.664.0 | 1.664.0 |
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