10

CVE-2026-111057: mljar mercury Incorrect Regular Expression

CVSS: 10.0v3.1CriticalDeferred
AliasesGHSA-f8c7-rwf9-fmgm
Published 19-10-2026Last modified 19-10-2026
Open JSON

Vulnerability summary

CVE-2026-111057 is a critical (CVSS 10.0) Incorrect Regular Expression vulnerability in mljar mercury. EPSS estimates a 0.44% chance of exploitation in the next 30 days, higher than 37.1% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
10.0/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.44%
0%100%
Low · Change unavailable
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 19-10-2026
    PublishedVulnerability first disclosed.

Description

Mercury is a Python framework for sharing Jupyter notebooks as web applications and dashboards. From 3.0.0 until 3.2.4, a missing comma in BLOCKED_PATTERNS concatenates the /lab and /api/terminals regular-expression literals. Requests to /api/terminals therefore bypass the anonymous endpoint blocklist and reach Jupyter Server's terminal API. An unauthenticated attacker can use the resulting interactive operating-system shell to execute commands and access data available to the Mercury process. This issue is fixed in version 3.2.4.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.44%

Chance of exploitation in the next 30 days

Percentile

37%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

20-10-202620-10-2026
EPSS score
0.44%

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≥ 3.0.0, < 3.2.4

2 vendors · 2 products

References

4 links