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Vulnerabilities

Vulnerability · CVE-2026-33881

Windmill is an open-source developer platform for internal code: APIs, background jobs, workflows and UIs.

Published Mar 27, 2026 · catalog updated Jun 17, 2026 · Windmill is an open-source

Check if you run it

No confirmed exploitation is on record for CVE-2026-33881. EPSS is 0.57%. Act only if a listed version of Windmill is an open-source is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Windmill is an open-source).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High7.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.57%
Remediation
Advisory link
Affected products
cpe windmill/windmill

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 , not related to the sandbox/NSJAIL topic. Version 1.664.0 patches the issue.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe windmill/windmillversion unspecified

How to fix CVE-2026-33881

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-33881. EPSS is 0.57%. Act only if a listed version of Windmill is an open-source is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-94: Code Injection. EPSS 0.57%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Mar 27, 2026 · NIST NVD

    Detected

    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

  2. Jun 17, 2026 · NIST NVD

    Updated

    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

Sources

  • CVE.orgVulnerability recordCVE-2026-33881

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-33881

    30-day exploitation probability 0.6%

    first.org
  • NIST NVDVulnerability recordCVE-2026-33881

    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

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.