9.8

CVE-2026-111058: mljar mercury Missing Authorization

CVSS: 9.8v3.1CriticalAwaiting analysis
AliasesGHSA-rv4m-xm3f-3ccq
Published 19-10-2026Last modified 19-10-2026
Open JSON

Vulnerability summary

CVE-2026-111058 is a critical (CVSS 9.8) Missing Authorization vulnerability in mljar mercury.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
Not scored
0%100%
No EPSS score yet
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 19-10-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

No EPSS score has been published for this record yet.

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Mljar1 product
PyPI1 product
  • mercury< 3.2.6

2 vendors · 2 products

References

4 links