CVE-2026-25725

CRITICAL

10.0

Description

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.

CVE Details

CVSS v3.1 Score10.0

SeverityCRITICAL

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published2/6/2026

Last Modified2/9/2026

Sourcenvd

Honeypot Sightings0

Affected Products

anthropic:claude_code

Weaknesses (CWE)

CWE-501CWE-668

References

https://github.com/anthropics/claude-code/security/advisories/GHSA-ff64-7w26-62rf(security-advisories@github.com)

IOC Correlations

No correlations recorded

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