Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Windmill | Windmill | < 1.664.0 |
Related Weaknesses (CWE)
References
- https://github.com/windmill-labs/windmill/security/advisories/GHSA-8q8j-mm3g-5c2ExploitMitigationVendor Advisory
FAQ
What is CVE-2026-33881?
CVE-2026-33881 is a vulnerability with a CVSS score of 7.2 (HIGH). 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 withou...
How severe is CVE-2026-33881?
CVE-2026-33881 has been rated HIGH with a CVSS base score of 7.2/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-33881?
Check the references section above for vendor advisories and patch information. Affected products include: Windmill Windmill.