CVE-2026-47107

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 victim workspaces across tenants.

References

https://www.vulncheck.com/advisories/windmill-incorrect-default-permissions-in-nsjail-configuration

https://github.com/windmill-labs/windmill/releases/tag/v1.703.2

https://github.com/windmill-labs/windmill/pull/9194

https://github.com/windmill-labs/windmill/commit/f8467f38c8a053117ce62f96684cfb15ef792f08

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3

CVSS v4