CVE-2026-33881

HIGH

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

Title source: cna

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.

References (1)

[X_Refsource_Confirm] https://github.com/windmill-labs/windmill/security/advisories/GHSA-8q8j-mm3g-5c2q

Scores

CVSS v3 7.2

EPSS 0.0006

EPSS Percentile 19.9%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment

Exploitation poc

Automatable no

Technical Impact total

Details

CWE

CWE-94

Status published

Products (2)

windmill/windmill < 1.664.0

windmill-labs/windmill < 1.664.0

Published Mar 27, 2026

Tracked Since Mar 29, 2026