Claude Code: Sandbox Escape via Git Worktree Path Confusion Allows Unsandboxed Code Execution
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.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-55607
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 02:49 UTC · Revision 1
Source evidence
Claude Code: Sandbox Escape via Git Worktree Path Confusion Allows Unsandboxed Code Execution
core-osv · Original sourcePublished 29 Jun 2026, 14:04 UTC
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.
osv:CVE-2026-55607
Complete source record
{
"id": "c316a8130c64edd2ce7bc8a91d875b819cec97c420f40b2d96cf55f6d4458112",
"url": "https://osv.dev/vulnerability/CVE-2026-55607",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Claude Code: Sandbox Escape via Git Worktree Path Confusion Allows Unsandboxed Code Execution",
"summary": "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.",
"evidence": "osv:CVE-2026-55607",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2026-55607",
"aliases": [
"CVE-2026-55607",
"GHSA-7835-87q9-rgvv"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "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"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/anthropics/claude-code",
"type": "GIT",
"events": [
{
"introduced": "19bb071fe024c1398d3f0a4b3ada25007cf5182c"
},
{
"fixed": "d1e174252d0af47174bd9fbdec6abb092b49226a"
}
],
"database_specific": {
"extracted_events": [
{
"range": [
{
"introduced": "2.1.38"
},
{
"fixed": "2.1.163"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"cpe": "cpe:2.3:a:anthropic:claude_code:*:*:*:*:*:node.js:*:*",
"range": [
{
"introduced": "2.1.38"
},
{
"fixed": "2.1.163"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
"v2.1.162",
"v2.1.161",
"v2.1.160",
"v2.1.159",
"v2.1.158",
"v2.1.157",
"v2.1.156",
"v2.1.154",
"v2.1.153",
"v2.1.152",
"v2.1.150",
"v2.1.149",
"v2.1.148",
"v2.1.147",
"v2.1.146",
"v2.1.145",
"v2.1.144",
"v2.1.143",
"v2.1.142",
"v2.1.141",
"v2.1.140",
"v2.1.139",
"v2.1.138",
"v2.1.137",
"v2.1.136",
"v2.1.133",
"v2.1.132",
"v2.1.131",
"v2.1.129",
"v2.1.128",
"v2.1.126",
"v2.1.123",
"v2.1.122",
"v2.1.121",
"v2.1.120",
"v2.1.119",
"v2.1.118",
"v2.1.117",
"v2.1.116",
"v2.1.114",
"v2.1.113",
"v2.1.112",
"v2.1.111",
"v2.1.110",
"v2.1.109",
"v2.1.108",
"v2.1.107",
"v2.1.105",
"v2.1.104",
"v2.1.101",
"v2.1.98",
"v2.1.100",
"v2.1.97",
"v2.1.96",
"v2.1.94",
"v2.1.92",
"v2.1.91",
"v2.1.90",
"v2.1.89",
"v2.1.88",
"v2.1.87",
"v2.1.86",
"v2.1.85",
"v2.1.84",
"v2.1.83",
"v2.1.81",
"v2.1.80",
"v2.1.79",
"v2.1.78",
"v2.1.77",
"v2.1.76",
"v2.1.75",
"v2.1.74",
"v2.1.73",
"v2.1.72",
"v2.1.71",
"v2.1.70",
"v2.1.69",
"v2.1.68",
"v2.1.66",
"v2.1.63",
"v2.1.62",
"v2.1.61",
"v2.1.59",
"v2.1.58",
"v2.1.56",
"v2.1.55",
"v2.1.53",
"v2.1.52",
"v2.1.51",
"v2.1.50",
"v2.1.49",
"v2.1.47",
"v2.1.45",
"v2.1.44",
"v2.1.42",
"v2.1.41",
"v2.1.39",
"v2.1.38"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55607.json"
}
}
],
"modified": "2026-10-28T02:30:25.156564792Z",
"provider": "osv",
"references": [
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55607.json",
"https://github.com/anthropics/claude-code/security/advisories/GHSA-7835-87q9-rgvv",
"https://nvd.nist.gov/vuln/detail/CVE-2026-55607"
],
"provider_metadata": {
"cwe_ids": [
"CWE-22",
"CWE-59",
"CWE-78"
],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55607.json"
}
},
"related_cves": [
{
"value": "CVE-2026-55607",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 492040,
"published_at": "2026-06-29T14:04:00.693+00:00"
}