PyCharm <2025.3.4 Stored XSS via Jupyter Markdown
CVE-2026-49384 Published on May 29, 2026
In JetBrains PyCharm before 2025.3.4 stored XSS in Jupyter notebook Markdown cells was possible
Vulnerability Analysis
CVE-2026-49384 is exploitable with network access, requires user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality and integrity, and no impact on availability.
Weakness Type
What is a XSS Vulnerability?
The software does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
CVE-2026-49384 has been classified to as a XSS vulnerability or weakness.
Products Associated with CVE-2026-49384
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Affected Versions
JetBrains PyCharm:- Before 2025.3.4 is affected.