https://vulnerability.circl.lu/rss/recent/all/10 Most recent entries from all 2026-10-07T07:54:21.058486+00:00 Vulnerability-Lookup info@circl.lu python-feedgen Contains only the most 10 recent entries. https://vulnerability.circl.lu/vuln/cve-2025-30167 CVE-2025-30167 — Jupyter Core on Windows Has Uncontrolled Search Path Element Local Privilege Escalation Vulnerability 2026-10-07T07:54:21.060854+00:00

Affected: jupyter_core

Jupyter Core is a package for the core common functionality of Jupyter projects. When using Jupyter Core prior to version 5.8.0 on Windows, the shared `%PROGRAMDATA%` directory is searched for configuration files (`SYSTEM_CONFIG_PATH` and `SYSTEM_JUPYTER_PATH`), which may allow users to create configuration files affecting other users. Only shared Windows systems with multiple users and unprotected `%PROGRAMDATA%` are affected. Users should upgrade to Jupyter Core version 5.8.0 or later to receive a patch. Some other mitigations are available. As administrator, modify the permissions on the `%PROGRAMDATA%` directory so it is not writable by unauthorized users; or as administrator, create the `%PROGRAMDATA%\jupyter` directory with appropriately restrictive permissions; or as user or administrator, set the `%PROGRAMDATA%` environment variable to a directory with appropriately restrictive permissions (e.g. controlled by administrators _or_ the current user).

 https://vulnerability.circl.lu/vuln/ghsa-33p9-3p43-82vq GHSA-33p9-3p43-82vq — Jupyter Core on Windows Has Uncontrolled Search Path Element Local Privilege Escalation Vulnerability 2026-10-07T07:54:21.060935+00:00

Affected: PyPI: jupyter_core

## Impact

On Windows, the shared `%PROGRAMDATA%` directory is searched for configuration files (`SYSTEM_CONFIG_PATH` and `SYSTEM_JUPYTER_PATH`), which may allow users to create configuration files affecting other users.

Only shared Windows systems with multiple users and unprotected `%PROGRAMDATA%` are affected.

## Mitigations

- upgrade to `jupyter_core>=5.8.1` (5.8.0 is patched but breaks `jupyter-server`) , or - as administrator, modify the permissions on the `%PROGRAMDATA%` directory so it is not writable by unauthorized users, or - as administrator, create the `%PROGRAMDATA%\jupyter` directory with appropriately restrictive permissions, or - as user or administrator, set the `%PROGRAMDATA%` environment variable to a directory with appropriately restrictive permissions (e.g. controlled by administrators _or_ the current user)

## Credit

Reported via Trend Micro Zero Day Initiative as ZDI-CAN-25932

 https://vulnerability.circl.lu/vuln/pysec-2026-1477 PYSEC-2026-1477 — Jupyter Core on Windows Has Uncontrolled Search Path Element Local Privilege Escalation Vulnerability 2026-10-07T07:54:21.060978+00:00

Affected: PyPI: jupyter-core

## Impact

On Windows, the shared `%PROGRAMDATA%` directory is searched for configuration files (`SYSTEM_CONFIG_PATH` and `SYSTEM_JUPYTER_PATH`), which may allow users to create configuration files affecting other users.

Only shared Windows systems with multiple users and unprotected `%PROGRAMDATA%` are affected.

## Mitigations

- upgrade to `jupyter_core>=5.8.1` (5.8.0 is patched but breaks `jupyter-server`) , or - as administrator, modify the permissions on the `%PROGRAMDATA%` directory so it is not writable by unauthorized users, or - as administrator, create the `%PROGRAMDATA%\jupyter` directory with appropriately restrictive permissions, or - as user or administrator, set the `%PROGRAMDATA%` environment variable to a directory with appropriately restrictive permissions (e.g. controlled by administrators _or_ the current user)

## Credit

Reported via Trend Micro Zero Day Initiative as ZDI-CAN-25932