Jupyter Server is the backend for Jupyter web applications.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

1. May 5, 2026 · NIST NVD

   Detected

   Jupyter Server is the backend for Jupyter web applications. In jupyter_server versions through 2.17.0, the next query parameter in the login flow is insufficiently validated in , which allows redirects to arbitrary external domains via values such as . An attacker can use a crafted login URL to redirect users to a malicious site and facilitate phishing attacks. This issue is fixed in version 2.18.

2. Oct 7, 2026 · NIST NVD

   Updated

   Jupyter Server is the backend for Jupyter web applications. In jupyter_server versions through 2.17.0, the next query parameter in the login flow is insufficiently validated in , which allows redirects to arbitrary external domains via values such as . An attacker can use a crafted login URL to redirect users to a malicious site and facilitate phishing attacks. This issue is fixed in version 2.18.

Affected

• cpe jupyter/jupyter serverversion unspecified

Sources

• CVE.orgVulnerability recordCVE-2025-61669

  Official CVE identifier

  cve.org
• NIST NVDVulnerability recordCVE-2025-61669

  Jupyter Server is the backend for Jupyter web applications. In jupyter_server versions through 2.17.0, the next query parameter in the login flow is insufficiently validated in , which allows redirects to arbitrary external domains via values su

  nvd.nist.gov

References

• Exploit · github.com