CVE-2026-123854
Medium
Description
In JetBrains PyCharm before 2026.3 code execution was possible in Safe Mode via a crafted Jupyter notebook widget module
SeverityMedium
CVSS5.5
Exploit probability—
Product
PyCharm
PublishedNov 6, 2026
First seenNov 6, 2026
Weakness typeCWE-829CWE-829
How to fix
Update
- JetBrains PyCharm2026.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| JetBrains PyCharm | v < 2026.3 | 2026.3 |
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