CVE-2026-49384

Name: CVE-2026-49384
Creator: NVD / NIST
Published: 2026-05-29T19:16:28.453+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.18%

Last modified Jun 17, 2026

CVE-2026-49384 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. In JetBrains PyCharm before 2025.3.4 stored XSS in Jupyter notebook Markdown cells was possible. EPSS estimates a 0.18% chance of exploitation in the next 30 days.

Description

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

Metrics

CVSS 3.1

6.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

0.18%

7.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Jetbrains	Pycharm	< 2025.3.4

References

https://www.jetbrains.com/privacy-security/issues-fixed/Vendor Advisory

Timeline

Published: May 29, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-49384?

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

How severe is CVE-2026-49384?

CVE-2026-49384 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.18% probability of exploitation in the next 30 days.

How do I fix CVE-2026-49384?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-49384?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST