CVE-2026-55607: Claude Code sandbox escape via git worktree path confusion

# CVE-2026-55607: Claude Code sandbox escape via git worktree path confusion

https://gcdradar.vercel.app/incidents/cve-2026-55607-claude-code-sandbox-escape-via-git-worktree-p · AIR-2026-0868 · closed 2026-06-29

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2026-06-29 (happened 2026-07-24)
- AI role: Attack on AI
- Products: Claude Code
- CVE ids: CVE-2026-55607
- CVSS: 7.7

## Summary

Claude Code worktree handling permitted path confusion and symlink manipulation when combined with malicious repository prompts. This enabled arbitrary code execution outside sandbox restrictions.

## What to do

No action recorded; read the sources below and the vendor's advisory.

## Latest updates

- 2026-07-24: CVE-2026-55607: Claude Code: Sandbox Escape via Git Worktree Path Confusion Allows Unsandboxed Code Execution (https://github.com/advisories/GHSA-7835-87q9-rgvv)
- 2026-06-29: CVE-2026-55607: Claude Code is an agentic coding tool. (https://nvd.nist.gov/vuln/detail/CVE-2026-55607)

## Sources

- 2026-06-29 NVD: CVE-2026-55607: Claude Code is an agentic coding tool. https://nvd.nist.gov/vuln/detail/CVE-2026-55607
- 2026-07-24 GitHub Advisory Database: CVE-2026-55607: Claude Code: Sandbox Escape via Git Worktree Path Confusion Allows Unsandboxed Code Execution https://github.com/advisories/GHSA-7835-87q9-rgvv

Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.