CVE-2026-40068 (GCVE-0-2026-40068)

Vulnerability from cvelistv5 – Published: 2026-05-05 20:52 – Updated: 2026-05-06 15:24
VLAI
Title
Claude Code arbitrary code execution via git worktree commondir trust dialog bypass
Summary
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.
Severity
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
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-06 14:50 UTC
CWE
  • CWE-20 - Improper Input Validation
  • CWE-77 - Improper Neutralization of Special Elements used in a Command ('Command Injection')
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7831 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
anthropics claude-code Affected: >= 2.1.63, < 2.1.84
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

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