Vulnerability · Published May 19, 2026 · Assigned by VulnCheck
CVE-2026-47107Windmill < 1.703.2 Incorrect Default Permissions in nsjail Configuration
High 8.1
In plain English
A high-severity incorrect default permissions in windmill from windmill-labs. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 21% of all known vulnerabilities).
Official description
Windmill prior to 1.703.2 contains an incorrect default permissions vulnerability in nsjail sandbox configuration files where /etc is bind-mounted without read-write restrictions, allowing authenticated users to write arbitrary entries to /etc/hosts, /etc/resolv.conf, and /etc/ssl/certs/ca-certificates.crt from within script execution sandboxes. Attackers can exploit persistent poisoned entries across all subsequent script executions on the same worker pod to redirect hostnames, intercept DNS queries, perform transparent HTTPS man-in-the-middle attacks, and intercept WM_TOKEN JWTs to gain workspace-admin access to other users' workspaces.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| windmill-labs | windmill | 0 – before 1.703.2 |
Weakness: CWE-276 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
References
- https://github.com/windmill-labs/windmill/releases/tag/v1.703.2 release-notes
- https://github.com/windmill-labs/windmill/pull/9194 issue-tracking
- https://github.com/windmill-labs/windmill/commit/f8467f38c8a053117ce62f96684cfb15ef792f08 patch
- https://www.vulncheck.com/advisories/windmill-incorrect-default-permissions-in-nsjail-configuration