CVE-2026-33881
highpriority · track · 29EPSS 0.004 · 33 %ileEUUSEPSS · scored 2026-10-28
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
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.1–7.3
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (2)
Products and version ranges known to be affected.
also known as (2)
Other names and identifiers for this entity.
sources
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references (5)
External citations — patches, advisories, analysis.
- https://access.redhat.com/security/cve/cve-2026-33881cnnvd
- https://github.com/windmill-labs/windmill/security/advisories/GHSA-8q8j-mm3g-5c2qcnnvd
- https://www.windmill.dev/Patchcnnvd
- https://github.com/windmill-labs/windmill/security/advisories/GHSA-8q8j-mm3g-5c2qenisa_euvd
- https://github.com/windmill-labs/windmill/security/advisories/GHSA-8q8j-mm3g-5c2qExploitMitigationVendor Advisorynvd
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