What’s Vulnerable › Vulnerabilities

CVE-2026-47107: Windmill < 1.703.2 Incorrect Default Permissions in nsjail Configuration

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-19 · updated 2026-10-06
• Weakness: CWE-276

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

• windmill-labs windmill: before 1.703.2 — fixed in 1.703.2

How to fix

Upgrade to a fixed version: windmill-labs windmill 1.703.2. Check the vendor advisory for mitigations.

References

• https://github.com/windmill-labs/windmill/commit/f8467f38c8a053117ce62f96684cfb15ef792f08
• https://github.com/windmill-labs/windmill/pull/9194
• https://github.com/windmill-labs/windmill/releases/tag/v1.703.2
• https://www.vulncheck.com/advisories/windmill-incorrect-default-permissions-in-nsjail-configuration
• https://github.com/windmill-labs/windmill/pull/9194

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