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

Severity: critical (CVSS 9.0 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-04-15 · updated 2026-06-17
Weakness: CWE-668

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.

Affected products

jupyterhub jupyter-remote-desktop-proxy: from 3.0.0, < 3.0.1

References

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