CVE-2025-32428: Jupyter remote desktop proxy TigerVNC Accessible Vulnerability

CRITICAL
Advisory Identifier: GHSA-vrq4-9hc3-cgp7
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CWE-668
Published
Advisory Summary

CVE-2025-32428 is a CRITICAL tigervnc accessible vulnerability (CWE-668: Exposure of Resource to Wrong Sphere) affecting Jupyter remote desktop proxy libraries in the PyPI ecosystem. The issue involves tigervnc accessible via the network and not just via a unix socket as intended. Remediation is available by upgrading affected packages to version 3.0.1.

CVE-2025-32428 at a Glance

CVE Identifier CVE-2025-32428
GHSA Identifier GHSA-vrq4-9hc3-cgp7
Severity CRITICAL
CVSS v3.1 Base Score N/A
CWE Classification CWE-668: Exposure of Resource to Wrong Sphere
Affected Product Jupyter remote desktop proxy
Package Ecosystem PyPI
Published Date
Last Updated

How to Fix CVE-2025-32428

To remediate this vulnerability, upgrade all affected Jupyter remote desktop proxy dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

jupyter-remote-desktop-proxy fixed: 3.0.1 
pip install jupyter-remote-desktop-proxy>=3.0.1
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show jupyter-remote-desktop-proxy

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2025-32428, inspect your installed packages using pip:

pip show jupyter-remote-desktop-proxy

Analyze the terminal output to locate any version of Jupyter remote desktop proxy in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 3.0.1), your application is affected.

Note: The pip show jupyter-remote-desktop-proxy command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-668: Exposure of Resource to Wrong Sphere, where the product exposes a resource to the wrong control sphere, providing unintended actors with inappropriate access to the resource. In Jupyter remote desktop proxy, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

## Summary `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. ## Credits This vulnerability was identified by Arne Gottwald at University of Göttingen and analyzed, reported, and reviewed by @frejanordsiek.

CVE-2025-32428 Affected Jupyter remote desktop proxy Versions

1 component(s)
Fixed Versions:
3.0.1
Product / Package Ecosystem Affected Versions Fixed Version
jupyter-remote-desktop-proxy
pypi/jupyter-remote-desktop-proxy
PyPI
≥ 3.0.0
< 3.0.1
All 1 versions
3.0.0
3.0.1

References

GitHub Advisory / Wiki ADVISORY
https://github.com/jupyterhub/jupyter-remote-desktop-proxy/security/advisories/GHSA-vrq4-9hc3-cgp7
NVD — CVE-2025-32428 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-32428
Security Fix Commit FIX COMMIT
https://github.com/jupyterhub/jupyter-remote-desktop-proxy/commit/7dd54c25a4253badd8ea68895437e5a66a59090d
Jupyter remote desktop proxy Source Repository REPOSITORY
https://github.com/jupyterhub/jupyter-remote-desktop-proxy

Frequently Asked Questions

What is CVE-2025-32428?
CVE-2025-32428 is a security vulnerability in Jupyter remote desktop proxy involving TigerVNC accessible via the network and not just via a UNIX socket as intended under CWE-668: Exposure of Resource to Wrong Sphere.
Which Jupyter remote desktop proxy versions are affected?
Affected versions include releases prior to 3.0.1 across affected packages: jupyter-remote-desktop-proxy.
What version fixes CVE-2025-32428?
Upgrading to 3.0.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is jupyter-remote-desktop-proxy affected?
Yes, jupyter-remote-desktop-proxy is affected in releases prior to 3.0.1. Upgrade your dependency to 3.0.1 or later.
What CWE is associated with CVE-2025-32428?
CVE-2025-32428 is classified under CWE-668: Exposure of Resource to Wrong Sphere (The product exposes a resource to the wrong control sphere, providing unintended actors with inappropriate access to the resource.).
How can I check PyPI dependencies for CVE-2025-32428?
Run the dependency tree command: 'pip show jupyter-remote-desktop-proxy'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-vrq4-9hc3-cgp7",
  "modified" : "2025-04-15T12:49:04Z",
  "published" : "2025-04-12T03:42:31Z",
  "aliases" : [ "CVE-2025-32428" ],
  "summary" : "TigerVNC accessible via the network and not just via a UNIX socket as intended",
  "details" : "## Summary\n\n`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.\n\nThis vulnerability does not affect users having TurboVNC as the `vncserver` executable.\n\n## Credits\n\nThis vulnerability was identified by Arne Gottwald at University of Göttingen and analyzed, reported, and reviewed by @frejanordsiek.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "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"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "jupyter-remote-desktop-proxy"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "3.0.0"
      }, {
        "fixed" : "3.0.1"
      } ]
    } ],
    "versions" : [ "3.0.0" ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/jupyterhub/jupyter-remote-desktop-proxy/security/advisories/GHSA-vrq4-9hc3-cgp7"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-32428"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/jupyterhub/jupyter-remote-desktop-proxy/commit/7dd54c25a4253badd8ea68895437e5a66a59090d"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/jupyterhub/jupyter-remote-desktop-proxy"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-668" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-04-12T03:42:31Z",
    "nvd_published_at" : "2025-04-15T00:15:14Z"
  }
}