CVE-2026-33881: high-severity vulnerability in windmill-labs windmill
Windmill: Rogue Workspace Admins can inject code via unescaped workspace environment variable interpolation in NativeTS executor
Published · Updated
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.3epss 0.6%
exploitation probability
0.6%top 52% of all CVEs
observed exploitation
nono source reports it
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: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
Affected products
windmill-labs · windmillRelated CVEs — windmill-labs windmill
In the same product, most dangerous first.
CVE-2026-29059MEDIUMWindmill: SUPERADMIN_SECRET (rarely used) can be accessed publiclyEPSS 2.2%CVE-2026-54136MEDIUMWindmill: Resource-scoped API tokens can read script contents outside their allowed path via scripts/list_searchEPSS 0.5%CVE-2026-26964LOWWindmill Exposes Workspace Slack OAuth Client Secrets to Non-Admin Workspace MembersEPSS 0.5%CVE-2026-47107HIGHWindmill < 1.703.2 Incorrect Default Permissions in nsjail ConfigurationEPSS 0.3%