PkgSeer

Vulnerability GHSA-7835-87q9-rgvv

High Risk
HIGH RISK
CVSS Score: 8.0
Score Range: 7.0–8.9
High severity vulnerabilities (CVSS 7.0–8.9). Serious vulnerabilities that should be prioritized soon after critical fixes.
2 months ago
July 24, 2026 at 04:54 PM UTC
Claude Code: Sandbox Escape via Git Worktree Path Confusion Allows Unsandboxed Code Execution
2.1.38 - 2.1.162
2.1.38 - 2.1.162

Summary

Claude Code: Sandbox Escape via Git Worktree Path Confusion Allows Unsandboxed Code Execution

Details

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.

Users on standard Claude Code auto-update have received this fix automatically. Users performing manual updates are advised to update to the latest version.

Thank you to hackerone.com/metnew for reporting this issue.

Related Vulnerabilities

Other vulnerabilities affecting the same packages

High Risk
6 hours ago
Claude Code: Plugin Hash Pin Bypass Allows Bypass of Hash Pinning
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0.2.9 - 2.1.178 GHSA-pq7j-f95f-qfcv
Medium Risk
3 months ago
@anthropic-ai/claude-code has an Insecure Temporary File in /copy Command that Enables Response Disclosure and Symlink-Based File Write
2.1.59 - 2.1.126 GHSA-4vp2-6q8c-pvq2
2.1.59 - 2.1.126 GHSA-4vp2-6q8c-pvq2
Critical
4 months ago
Claude Code: Out-of-Band Data Exfiltration via Pre-Approved HuggingFace Domain in WebFetch
0.2.54 - 2.1.162 GHSA-fg94-h982-f3mm
0.2.54 - 2.1.162 GHSA-fg94-h982-f3mm
High Risk
5 months ago
Claude Code: Trust Dialog Bypass via Git Worktree Spoofing Allows Arbitrary Code Execution
2.1.63 - 2.1.83 GHSA-q5hj-mxqh-vv77
2.1.63 - 2.1.83 GHSA-q5hj-mxqh-vv77
Critical
5 months ago
Claude Code: Sandbox Escape via Symlink Following Allows Arbitrary File Write Outside Workspace
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0.2.9 - 2.1.63 GHSA-vp62-r36r-9xqp
View all vulnerabilities for these packages

Impacted packages

Timeline

Published
2 months ago
July 24, 2026 at 04:54 PM UTC
Fixed (2.1.163)
4 months ago
June 04, 2026 at 05:56 PM UTC
Last Modified
2 months ago
July 24, 2026 at 05:01 PM UTC