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CVE-2026-25725

🚨 CRITICAL

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 exi...

Published
Feb 06, 2026
Last Modified
Feb 09, 2026
Views
13
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0

Description

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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.

Affected Products (1)

anthropic - claude_code

Version: *

CVSS Scores

CVSS 3.1 10.0
10.0
CRITICAL
CVSS 2.0 10.0

References

github.com

Additional Information

Source
security-advisories@github.com
State
Analyzed

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