CVE-2026-49384CWE-79

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

Medium · published May 29, 2026

CVSS v3.1
6.1
EPSS
0%
Percentile
15.9
In the wild
Unconfirmed
What it is

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

The record
Technical detail
CVSS v3.1
6.1 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00253 · 15.9th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-05-29T18:15Z
EPSS history
Timeline
  • 29 MAY 18:15Z
    In JetBrains PyCharm before 2025.3.4 stored XSS in Jupyter notebook Markdown cells was possible
    cvelistv5