PyCharm Safe Mode Code Execution via Jupyter Widget Module

In JetBrains PyCharm before 2026.3 code execution was possible in Safe Mode via a crafted Jupyter notebook widget module

GitHub access token could be exposed to third-party sites in JetBrains IDEs after version 2023.1 and less than: IntelliJ IDEA 2023.1.7, 2023.2.7, 2023.3.7, 2024.1.3, 2024.2 EAP3; Aqua 2024.1.2; CLion 2023.1.7, 2023.2.4, 2023.3.5, 2024.1.3, 2024.2 EAP2; DataGrip 2023.1.3, 2023.2.4, 2023.3.5, 2024.1.4; DataSpell 2023.1.6, 2023.2.7, 2023.3.6, 2024.1.2, 2024.2 EAP1; GoLand 2023.1.6, 2023.2.7, 2023.3.7, 2024.1.3, 2024.2 EAP3; MPS 2023.2.1, 2023.3.1, 2024.1 EAP2; PhpStorm 2023.1.6, 2023.2.6, 2023.3.7, 2024.1.3, 2024.2 EAP3; PyCharm 2023.1.6, 2023.2.7, 2023.3.6, 2024.1.3, 2024.2 EAP2; Rider 2023.1.7, 2023.2.5, 2023.3.6, 2024.1.3; RubyMine 2023.1.7, 2023.2.7, 2023.3.7, 2024.1.3, 2024.2 EAP4; RustRover 2024.1.1; WebStorm 2023.1.6, 2023.2.7, 2023.3.7, 2024.1.4

JetBrains IDEs Trust Revoked Intermediate Certificates

In JetBrains IntelliJ IDEA, PyCharm, PhpStorm, RubyMine and WebStorm before 2026.3, 2026.2.4, 2026.1.5.1, and 2025.3.6.2; GoLand before 2026.3, 2026.2.4, 2026.1.5.1, and 2025.3.5.2; Rider before 2026.3, 2026.2.4, 2026.1.5.3, and 2025.3.5.3; CLion before 2026.3, 2026.2.4.1, 2026.1.5.2, and 2025.3.6.3; DataGrip before 2026.3, 2026.2.6.1, 2026.1.4.1, and 2025.3.6.1; RustRover before 2026.3, 2026.2.5, 2026.1.4.1, and 2025.3.7.1; DataSpell before 2026.1.3.1 and 2025.3.3.1, the embedded browser trusted revoked intermediate certificates

Code Execution via PyCharm Quick Documentation in Pre‑2026.2.1 Versions

In JetBrains PyCharm before 2026.2.1 code execution via Quick Documentation was possible

Unauthenticated Code Execution via Jupyter MCP Tools in JetBrains PyCharm

In JetBrains PyCharm before 2026.2.1 code execution was possible via unauthenticated Jupyter MCP tools

In JetBrains PyCharm before 2026.1.4, 2026.2 arbitrary code execution via malicious Python executable was possible on untrusted project open

Stored XSS Vulnerability in PyCharm Jupyter Notebook Markdown Cells

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

DOM‑based XSS in PyCharm Jupyter Viewer

In JetBrains PyCharm before 2025.3.2 a DOM-based XSS on Jupyter viewer page was possible

In JetBrains Rider before 2022.1 local code execution via links in ReSharper Quick Documentation was possible

In JetBrains PyCharm before 2022.1 exposure of the debugger port to the internal network was possible

JetBrains IntelliJ IDEA 2021.3.1 Preview, IntelliJ IDEA 2021.3.1 RC, PyCharm Professional 2021.3.1 RC, GoLand 2021.3.1, PhpStorm 2021.3.1 Preview, PhpStorm 2021.3.1 RC, RubyMine 2021.3.1 Preview, RubyMine 2021.3.1 RC, CLion 2021.3.1, WebStorm 2021.3.1 Preview, and WebStorm 2021.3.1 RC (used as Remote Development backend IDEs) bind to the 0.0.0.0 IP address. The fixed versions are: IntelliJ IDEA 2021.3.1, PyCharm Professional 2021.3.1, GoLand 2021.3.2, PhpStorm 2021.3.1 (213.6461.83), RubyMine 2021.3.1, CLion 2021.3.2, and WebStorm 2021.3.1.

In JetBrains PyCharm before 2020.3.4, local code execution was possible because of insufficient checks when getting the project from VCS.

In JetBrains PyCharm 2019.2.5 and 2019.3 on Windows, Apple Notarization Service credentials were included. This is fixed in 2019.2.6 and 2019.3.3.

JetBrains PyCharm before 2019.2 was allocating a buffer of unknown size for one of the connection processes. In a very specific situation, it could lead to a remote invocation of an OOM error message because of Uncontrolled Memory Allocation.