CVE-2026-111059
MEDIUM
CVSS 6.1
Published: 2026-10-19
Modified: 2026-10-20
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Description
Mercury is a Python framework for sharing Jupyter notebooks as web applications and dashboards. From 3.0.0 until 3.2.11, mr.Markdown converts attacker-controlled Markdown to HTML without sanitizing raw HTML before assigning it to an ipywidgets.HTML sink. Event-handler attributes and other active HTML can therefore reach the DOM and execute when another user views the application. This issue is fixed in version 3.2.11.
Quick Facts
| CVE ID | CVE-2026-111059 |
| CVSS Score | 6.1 |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| Published | 2026-10-19 |
| Exploited | No |
| CISA KEV | No |
| PoC | Not public |