CVE-2026-25725

Claude Code is an agentic coding tool. Prior to version 2.1.2, Claude Code's bubblewrap sandboxing mechanism failed to properly protect the .claude/settings.json configuration file when it did not exist at startup. While the parent directory was mounted as writable and .claude/settings.local.json was explicitly protected with read-only constraints, settings.json was not protected if it was missing. This allowed malicious code running inside the sandbox to create this file and inject persistent hooks (such as SessionStart commands) that would execute with host privileges when Claude Code was restarted. This issue has been patched in version 2.1.2.

CVSS v3 10.0 CRITICAL

10.0^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 6.0

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
https://github.com/anthropics/claude-code/security/advisories/GHSA-ff64-7w26-62rf	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:anthropic:claude_code:*:*:*:*:*:node.js:*:*

History

No history.

Information

Published : 2026-02-06 18:16

Updated : 2026-02-09 14:46

NVD link : CVE-2026-25725

Mitre link : CVE-2026-25725

CVE.ORG link : CVE-2026-25725

JSON object : View

Products Affected

anthropic

claude_code

CWE

CWE-501

Trust Boundary Violation

CWE-668

Exposure of Resource to Wrong Sphere

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