CVE-2026-111058
mljar mercury
Published 19 Oct 2026 · updated 19 Oct 2026 · Received
9.8 Critical · CVSS 3.1, github.com
Description
Mercury is a Python framework for sharing Jupyter notebooks as web applications and dashboards. Prior to 3.2.6, default tokenless deployments allow anonymous clients to create Jupyter kernels and send execute_request messages containing arbitrary Python. The endpoint blocklist does not cover /api/kernels, and the websocket wrapper previously tracked idle activity without authorizing executable messages. This issue is fixed in version 3.2.6.