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CVE-2026-40068— Claude Code arbitrary code execution via git worktree commondir trust dialog bypass

Quick assessment

Affected
anthropics claude-code
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Claude Code是Anthropic开源的一个终端原生AI编程工具。 Claude Code 2.1.63版本至2.1.83版本存在输入验证错误漏洞，该漏洞源于文件夹信任确定逻辑未验证git worktree commondir文件内容，可能导致绕过信任确认对话框并立即执行钩子。

AI Predicted 5.9 Difficulty: Moderate EPSS 0.56% · P45

Affected Version Matrix 1

VendorProduct Version RangeStatus
anthropics claude-code >= 2.1.63, < 2.1.84 affected
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I. Basic Information for CVE-2026-40068

Vulnerability Information
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Vulnerability Title
Claude Code arbitrary code execution via git worktree commondir trust dialog bypass
Source: CVE Program / CVE List V5
Vulnerability Description
In versions 2.1.63 through 2.1.83 of Claude Code, the folder trust determination logic used the git worktree commondir file without validating its contents. An attacker could craft a malicious repository with a commondir file pointing to a path the victim had previously trusted, causing Claude Code to bypass its trust confirmation dialog and immediately execute hooks defined in `.claude/settings.json`. Exploitation requires the victim to clone the malicious repository and run Claude Code within it, and the attacker must know or guess a path the victim had already trusted. This issue has been fixed in version 2.1.84.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Claude Code 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Claude Code是Anthropic开源的一个终端原生AI编程工具。 Claude Code 2.1.63版本至2.1.83版本存在输入验证错误漏洞，该漏洞源于文件夹信任确定逻辑未验证git worktree commondir文件内容，可能导致绕过信任确认对话框并立即执行钩子。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
anthropics claude-code >= 2.1.63, < 2.1.84 -

II. Public POCs for CVE-2026-40068

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III. Intelligence Information for CVE-2026-40068

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Vendor Advisories for CVE-2026-40068 (1)

IV. Related Vulnerabilities

Same product: claude-code
Same vendor: anthropics
Same weakness: CWE-20

V. Comments for CVE-2026-40068

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