Claude Code is an agentic coding tool. Claude Code extensions in VSCode and forks (e.g., Cursor, Windsurf, and VSCodium) and JetBrains IDEs (e.g., IntelliJ, Pycharm, and Android Studio) are vulnerable to unauthorized websocket connections from an attacker when visiting attacker-controlled webpages. Claude Code for VSCode IDE extensions versions 0.2.116 through 1.0.23 are vulnerable. For Jetbrains IDE plugins, Claude Code [beta] versions 0.1.1 through 0.1.8 are vulnerable. In VSCode (and forks), exploitation would allow an attacker to read arbitrary files, see the list of files open in the IDE, get selection and diagnostics events from the IDE, or execute code in limited situations where a user has an open Jupyter Notebook and accepts a malicious prompt. In JetBrains IDEs, an attacker could get selection events, a list of open files, and a list of syntax errors. Claude released a patch for this issue on June 13th, 2025. Although Claude Code auto-updates when a user launch it and auto-updates the extensions, users should take the following steps, though the exact steps depend on one's integrated development environment (IDE). For VSCode, Cursor, Windsurf, VSCodium, and other VSCode forks, check the extension Claude Code for VSCode. Open the list of Extensions (View->Extensions), look for Claude Code for VSCode among installed extensions, update or uninstall any version prior to 1.0.24, and restart the IDE. For JetBrains IDEs including IntelliJ, PyCharm, and Android Studio, check the plugin Claude Code [Beta]. Open the Plugins list, look for Claude Code [Beta] among installed extensions, update or uninstall any version prior to 0.1.9, and restart the IDE.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - Claude Code is an agentic coding tool. Claude Code extensions in VSCode and forks (e.g., Cursor, Windsurf,
    and VSCodium) and JetBrains IDEs (e.g., IntelliJ, Pycharm, and Android Studio) are vulnerable to
    unauthorized websocket connections from an attacker when visiting attacker-controlled webpages. Claude
    Code for VSCode IDE extensions versions 0.2.116 through 1.0.23 are vulnerable. For Jetbrains IDE plugins,
    Claude Code [beta] versions 0.1.1 through 0.1.8 are vulnerable. In VSCode (and forks), exploitation would
    allow an attacker to read arbitrary files, see the list of files open in the IDE, get selection and
    diagnostics events from the IDE, or execute code in limited situations where a user has an open Jupyter
    Notebook and accepts a malicious prompt. In JetBrains IDEs, an attacker could get selection events, a list
    of open files, and a list of syntax errors. Claude released a patch for this issue on June 13th, 2025.
    Although Claude Code auto-updates when a user launch it and auto-updates the extensions, users should take
    the following steps, though the exact steps depend on one's integrated development environment (IDE). For
    VSCode, Cursor, Windsurf, VSCodium, and other VSCode forks, check the extension Claude Code for VSCode.
    Open the list of Extensions (View->Extensions), look for Claude Code for VSCode among installed
    extensions, update or uninstall any version prior to 1.0.24, and restart the IDE. For JetBrains IDEs
    including IntelliJ, PyCharm, and Android Studio, check the plugin Claude Code [Beta]. Open the Plugins
    list, look for Claude Code [Beta] among installed extensions, update or uninstall any version prior to
    0.1.9, and restart the IDE. (CVE-2025-52882)

ID	Name	Product	Family	Type	Severity
427899	SCA: security update for @anthropic-ai/claude-code (GHSA-9f65-56v6-gxw7)	Tenable Cloud Security	SCA Checks	Local	high
427899	SCA: security update for @anthropic-ai/claude-code (GHSA-9f65-56v6-gxw7)	Tenable Self-Hosted Container Security	SCA Checks	Local	high

Detections

Analytics

CVE-2025-52882

high

Tenable Plugins

high

high