CVE-2026-55607

Claude Code is an agentic coding tool. From 2.1.38 until 2.1.163, Claude Code's worktree handling allowed creation of worktrees named ".git" and navigation to worktrees outside the sandbox context, enabling git directory confusion attacks. By exploiting symlink manipulation and git fsmonitor execution during worktree operations, an attacker could overwrite files in the user's home directory (such as .zshenv), leading to code execution outside of seatbelt sandbox restrictions. Reliably exploiting this required the user to clone a malicious repository containing prompt injection content and run Claude Code against it. This vulnerability is fixed in 2.1.163.

CVSS v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/anthropics/claude-code/security/advisories/GHSA-7835-87q9-rgvv	Vendor Advisory

Configurations

Configuration 1 (hide)

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

History

30 Jun 2026, 16:17

Type	Values Removed	Values Added
CPE		cpe:2.3:a:anthropic:claude_code::::::node.js::*
First Time		Anthropic Anthropic claude Code
References	~~() https://github.com/anthropics/claude-code/security/advisories/GHSA-7835-87q9-rgvv -~~	() https://github.com/anthropics/claude-code/security/advisories/GHSA-7835-87q9-rgvv - Vendor Advisory
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 8.8

29 Jun 2026, 15:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-29 15:16

Updated : 2026-06-30 16:17

NVD link : CVE-2026-55607

Mitre link : CVE-2026-55607

CVE.ORG link : CVE-2026-55607

JSON object : View

Products Affected

anthropic

claude_code

CWE

CWE-22

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CWE-59

Improper Link Resolution Before File Access ('Link Following')

CWE-78

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

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