CVE-2026-111058 — Mercury: Unauthenticated Remote Code Execution via /api/kernels
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 J…
Published: 2026-10-19 · CVSS: 9.8 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7