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CVE WatchNov 6, 2026

CVE-2026-123854

In JetBrains PyCharm before 2026.3 code execution was possible in Safe Mode via a crafted Jupyter notebook widget module

CVSS

5.5

Medium

EPSS

—

KEV

—

Exploit Today

0

0-100

Published: Nov 6, 2026 · Last modified: Nov 6, 2026 · CWE-829

EPSS · 30d

Not enough EPSS history yet.

Technical description

In JetBrains PyCharm before 2026.3 code execution was possible in Safe Mode via a crafted Jupyter notebook widget module

Official references

www.jetbrains.comhttps://www.jetbrains.com/privacy-security/issues-fixed/

Related CVEs

CVECVSSEPSSKEVRExploitTitleMod.

CVE-2026-1238584.4 MED

——0In JetBrains PhpStorm before 2026.3 project files could be automatically uploaded to a deployment server from untrusted projects8h CVE-2026-1238537.8 HIG

——0In JetBrains IntelliJ IDEA before 2026.3, 2026.2.2 code execution was possible in Safe Mode via project-controlled JVM options of the build process8h CVE-2026-1238497.0 HIG

——0In JetBrains IntelliJ IDEA before 2026.3 code execution was possible in untrusted projects via the Terraform File Watchers8h CVE-2026-1238433.3 LOW

——0In JetBrains IntelliJ IDEA before 2026.3 untrusted projects could trigger changes to GPG agent configuration8h CVE-2026-1238387.8 HIG

——0In JetBrains IntelliJ IDEA before 2026.3 code execution was possible in Safe Mode via UI Designer form file8h CVE-2026-1238333.6 LOW

——0In JetBrains IntelliJ IDEA before 2026.3 database connections could be established in untrusted projects8h