CVE-2026-49384
PyCharm Professional Edition and 2 others: In JetBrains PyCharm before 2025.3.4 stored XSS in Jupyter notebook Markdown cells was possible
CVE-2026-49384 is fixed in PyCharm on 1 platform by PyCharm 2025.3.4 (version 2025.3.4), released March 25, 2026. 4 other affected products have no fix yet. It is not reported as exploited. Patch Radar priority: Routine.
Routine
CVSS
6.1
No vendor severity
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0018
7th percentile
In JetBrains PyCharm before 2025.3.4 stored XSS in Jupyter notebook Markdown cells was possible
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Windows apps | |||
| PyCharm | 2025.3.4 | PyCharm 2025.3.4 | Mar 25, 2026 |
| No fix yet | |||
| PyCharm (EAP) (Windows apps) | No fix yet | no-fix | n/a |
| PyCharm Community Edition (Windows apps) | No fix yet | no-fix | n/a |
| PyCharm Professional Edition (Windows apps) | No fix yet | no-fix | n/a |
| PyCharm Professional Edition (EAP) (Windows apps) | No fix yet | no-fix | n/a |
Patch Radar data is free to use with attribution. Terms and how to credit it.
Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.