CVE-2026-33881
Windmill: Rogue Workspace Admins can inject code via unescaped workspace environment variable interpolation in NativeTS executor
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- High
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Windmill: Rogue Workspace Admins can inject code via unescaped workspace environment variable interpolation in NativeTS executor
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.
- Record
CVE-2026-33881- CVSS 4.0
- 7.3 High
CVSS: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 - Weakness
- CWE-94
- Updated
- 2026-11-02
EUVDEUVD-2026-16820
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.
- Record
EUVD-2026-16820- CVSS 4.0
- 7.3 High
CVSS: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 - Updated
- 2026-11-02
NVD
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.
- Record
CVE-2026-33881- CVSS 4.0
- 7.3 High
CVSS: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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1
- 7.2 High
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-94
- Updated
- 2026-11-02
OSV
Windmill: Rogue Workspace Admins can inject code via unescaped workspace environment variable interpolation in NativeTS executor
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.
- Record
CVE-2026-33881- CVSS 4.0
- 7.3 High
CVSS: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 - Weakness
- CWE-94
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-33881 is a high vulnerability (CVSS 7.3) in Windmill, published March 27, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.39%, the 33rd percentile. No source names a fixed version.