Jupyter Server: 5xx request logging leaks token-bearing Referer header values

SummaryWhen a request returns a 500, jupyterserver/log.py logs a small JSON block of request headers. The Referer header was copied into it as-is, so a token in the Referer URL ended up in the logs in plain text. ImpactAnyone who can read the server logs can pick tokens out of these 500 entries...

CVE-2026-86049

Jupyter Server (the backend for Jupyter web applications) prior to version 2.21.0 contains a token-leak flaw in the 5xx request logging path within jupyter_server/log.py. The Referer header is copied into a JSON header block without applying the same token scrubbing used for the request URI. When...

CVE-2026-86049 Jupyter Server: 5xx request logging leaks token-bearing Referer header values

Jupyter Server is the backend for Jupyter web applications. Prior to version 2.21.0, the 5xx request logging path in jupyterserver/log.py copies the Referer header into a JSON header block without applying the token scrubbing used for the request URI. A request that returns HTTP 500 while the...

CVE-2026-86049: Insertion of Sensitive Information into Log File

Jupyter Server is the backend for Jupyter web applications. Prior to version 2.21.0, the 5xx request logging path in jupyterserver/log.py copies the Referer header into a JSON header block without applying the token scrubbing used for the request URI. A request that returns HTTP 500 while the...

CVE-2025-12516: Unexpected Status Code or Return Value

Lack of Graceful Error Handling - HTTP 5xx ErrorThis issue affects BLU-IC2: through 1.19.5; BLU-IC4: through 1.19.5...

BIT-JUPYTER-NOTEBOOK-2022-24758 Insertion of Sensitive Information into Log File affects Jupyter Notebook

The Jupyter notebook is a web-based notebook environment for interactive computing. Prior to version 6.4.9, unauthorized actors can access sensitive information from server logs. Anytime a 5xx error is triggered, the auth cookie and other header values are recorded in Jupyter server logs by...

CVE-2022-24758

The Jupyter notebook is a web-based notebook environment for interactive computing. Prior to version 6.4.9, unauthorized actors can access sensitive information from server logs. Anytime a 5xx error is triggered, the auth cookie and other header values are recorded in Jupyter server logs by...

CVE-2022-24758

The Jupyter notebook is a web-based notebook environment for interactive computing. Prior to version 6.4.9, unauthorized actors can access sensitive information from server logs. Anytime a 5xx error is triggered, the auth cookie and other header values are recorded in Jupyter server logs by...

CVE-2022-24758 Insertion of Sensitive Information into Log File affects Jupyter Notebook

The Jupyter notebook is a web-based notebook environment for interactive computing. Prior to version 6.4.9, unauthorized actors can access sensitive information from server logs. Anytime a 5xx error is triggered, the auth cookie and other header values are recorded in Jupyter server logs by...

CVE-2022-24758: Insertion of Sensitive Information into Log File

The Jupyter notebook is a web-based notebook environment for interactive computing. Prior to version 6.4.9, unauthorized actors can access sensitive information from server logs. Anytime a 5xx error is triggered, the auth cookie and other header values are recorded in Jupyter server logs by...

GHSA-P737-P57G-4CPR Insertion of Sensitive Information into Log File in Jupyter notebook

Impact What kind of vulnerability is it? Anytime a 5xx error is triggered, the auth cookie and other header values are recorded in Jupyter Server logs by default. Considering these logs do not require root access, an attacker can monitor these logs, steal sensitive auth/cookie information, and ga...

Insertion of Sensitive Information into Log File in Jupyter notebook

Impact What kind of vulnerability is it? Anytime a 5xx error is triggered, the auth cookie and other header values are recorded in Jupyter Server logs by default. Considering these logs do not require root access, an attacker can monitor these logs, steal sensitive auth/cookie information, and ga...

CVE-2022-24757

The Jupyter Server provides the backend i.e. the core services, APIs, and REST endpoints for Jupyter web applications. Prior to version 1.15.4, unauthorized actors can access sensitive information from server logs. Anytime a 5xx error is triggered, the auth cookie and other header values are...

CVE-2022-24757: Insertion of Sensitive Information into Log File

The Jupyter Server provides the backend i.e. the core services, APIs, and REST endpoints for Jupyter web applications. Prior to version 1.15.4, unauthorized actors can access sensitive information from server logs. Anytime a 5xx error is triggered, the auth cookie and other header values are...

CVE-2021-21416

django-registration is a user registration package for Django. The django-registration package provides tools for implementing user-account registration flows in the Django web framework. In django-registration prior to 3.1.2, the base user-account registration view did not properly apply filters...

Reolink P2P Cameras

1. EXECUTIVE SUMMARY CVSS v3 9.1 ATTENTION: Exploitable remotely/low skill level to exploit Vendor: Reolink Equipment: P2P protocol Vulnerabilities: Use of Hard-coded Cryptographic Key, Cleartext Transmission of Sensitive Information 2. RISK EVALUATION Successful exploitation of these...

CVE-2009-2059

Opera, possibly before 9.25, uses the HTTP Host header to determine the context of a document provided in a 1 4xx or 2 5xx CONNECT response from a proxy server, which allows man-in-the-middle attackers to execute arbitrary web script by modifying this CONNECT response, aka an "SSL tampering" atta...

Hardcoded credentials

Apple Safari before 3.2.2 uses the HTTP Host header to determine the context of a document provided in a 1 4xx or 2 5xx CONNECT response from a proxy server, which allows man-in-the-middle attackers to execute arbitrary web script by modifying this CONNECT response, aka an "SSL tampering" attack...