CVE-2026-49384: JetBrains Pycharm

Medium severity, CVSS 6.1. EPSS: 0.3% chance of exploitation in the next 30 days.

In JetBrains PyCharm before 2025.3.4 stored XSS in Jupyter notebook Markdown cells was possible

Affected products

• JetBrains Pycharm: before 2025.3.4 (fixed in 2025.3.4)

Published 2026-05-29. Last modified 2026-07-22.