What is CVE-2026-49384?

CVE-2026-49384 is a medium-severity vulnerability in Jetbrains Pycharm, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-05-29.

How severe is CVE-2026-49384?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Jetbrains Pycharm

CVE-2026-49384

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

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.001 (25.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Jetbrains Pycharm — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

cve@jetbrains.com (Vendor Advisory)

Frequently asked questions

What is CVE-2026-49384?: CVE-2026-49384 is a medium-severity vulnerability in Jetbrains Pycharm, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-05-29.
How severe is CVE-2026-49384?: Medium severity. CVSS v3 base score is 6.1 out of 10.