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TI-2026-36557 Aliases CVE-2026-49384GHSA-94rv-v2wh-r9wx

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

Priority LOW 26CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

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

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00181 7th percentileScored 2026-11-07
Fix Fixed PyCharm (JetBrains): 2025.3.4

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
JetBrainsPyCharmbefore 2025.3.42025.3.4Patch availableCNA
  • PyCharm VendorJetBrains Affected before 2025.3.4 Fixed in 2025.3.4 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:jetbrains:pycharm:*:*:*:*:*:*:*:*before 2025.3.4VulnerableJetBrains
  • cpe:2.3:a:jetbrains:pycharm:*:*:*:*:*:*:*:* Versions before 2025.3.4 Vulnerable ·JetBrains

Remediation

  • Fix · CNA PyCharm (JetBrains) Fixed in 2025.3.4

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-49384
  2. 2026-10-03 Alias added: GHSA-94rv-v2wh-r9wx

References

Advisory 1

  • TI-2024-24589 Insufficiently protected credentials in JetBrains IntelliJ IDEA CVSS 3.1CRITICAL 9.3
  • TI-2021-20971 JetBrains IntelliJ IDEA 2021.3.1 Preview, IntelliJ IDEA 2021.3.1 RC, PyCharm Professional… CVSS 3.1CRITICAL 9.8
  • TI-2026-52746 In JetBrains PyCharm before 2026.2.1 code execution was possible via unauthenticated Jupyter MCP tools CVSS 3.1HIGH 8.4
  • TI-2026-46948 In JetBrains PyCharm before 2026.1.4, 2026.2 arbitrary code execution via malicious… CVSS 3.1HIGH 8.6
  • TI-2026-20893 In JetBrains PyCharm before 2025.3.2 a DOM-based XSS on Jupyter viewer page was possible CVSS 3.1HIGH 8.2
  • TI-2020-09386 In JetBrains PyCharm 2019.2.5 and 2019.3 on Windows, Apple Notarization Service… CVSS 3.1HIGH 7.5
See all 11 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences