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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.

PUBLISHED Reserved 2026-03-24 | Published 2026-03-27 | Updated 2026-04-01 | Assigner GitHub_M




HIGH: 7.3CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P

Problem types

CWE-94: Improper Control of Generation of Code ('Code Injection')

Product status

< 1.664.0
affected

References

github.com/...ndmill/security/advisories/GHSA-8q8j-mm3g-5c2q

cve.org (CVE-2026-33881)

nvd.nist.gov (CVE-2026-33881)

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