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CVE-2026-111058— Mercury: Unauthenticated Remote Code Execution via /api/kernels

Quick assessment

Affected
mljar mercury
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Mercury 是一个用于将 Jupyter 笔记本作为 Web 应用程序和仪表盘进行共享的 Python 框架。在 3.2.6 版本之前，默认的不需令牌（tokenless）部署允许匿名用户创建 Jupyter 内核，并发送包含任意 Python 代码的 消息。该框架的端点黑名单并未涵盖 ，且此前 WebSocket 包装器在追踪空闲活动时未对可执行消息进行授权验证。此问题已在 3.2.6 版本中修复。

CVSS 9.8 · Critical

Affected Version Matrix 1

VendorProduct Version RangeStatus
mljar mercury < 3.2.6 affected
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I. Basic Information for CVE-2026-111058

Vulnerability Information
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Vulnerability Title
Mercury: Unauthenticated Remote Code Execution via /api/kernels
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
mljar mercury < 3.2.6 -

II. Public POCs for CVE-2026-111058

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III. Intelligence Information for CVE-2026-111058

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Vendor Advisories for CVE-2026-111058 (1)

Vendor Pages for CVE-2026-111058 (1)

Same Patch Batch · mljar · 2026-10-19 · 3 CVEs total

CVE-2026-111057 10.0 CRITICAL Mercury: Unauthenticated Remote Code Execution in /api/terminals - access control bypass
CVE-2026-111059 6.1 MEDIUM Mercury: Stored / DOM Cross-Site Scripting (XSS): mr.Markdown renders untrusted content as

IV. Related Vulnerabilities

Same product: mercury
Same vendor: mljar
Same weakness: CWE-862

V. Comments for CVE-2026-111058

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