CVEvulnerability

CVE-2026-55607

7.7 HIGH Published 2026-06-29 Modified 2026-10-25 Official page ↗
Status
Analyzed
Published
2026-06-29
Last modified
2026-10-25
Assigner
[email protected]
CVSS 4.0 ([email protected])
7.7 HIGH — CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1 ([email protected])
8.8 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weaknesses
CWE-22, CWE-59, CWE-78

Description

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.

Affected configurations

• anthropic claude code (>= 2.1.38 < 2.1.163)

Related

Weakness · CWE (3)

  • CWE-22 Improper Limitation of a Pathname to a Restricted Directory weakness
  • CWE-59 Improper Link Resolution Before File Access weakness
  • CWE-78 Improper Neutralization of Special Elements used in an OS Command weakness

References