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High

Claude Code Command Validation Bypass Allows Arbitrary Code Execution

  • Disclosed: 03.12.2025
  • Updated: 11.10.2026 10:22

Due to errors in parsing shell commands related to $IFS and short CLI flags, it was possible to bypass the Claude Code read-only validation and trigger arbitrary code execution. Reliably exploiting this requires the ability to add untrusted content into a Claude Code context window.

Users on standard Claude Code auto-update have received this fix already. Users performing manual updates are advised to update to the latest version.

Thank you to RyotaK from GMO Flatt Security Inc. for reporting this issue!

Affected software

Click a technology to see all vulnerabilities affecting it.

PlatformPackageVulnerable versionsFixed in
npm package @anthropic-ai/claude-code < 1.0.93 1.0.93

References

CVSS score -
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Weakness (CWE)
CWE-20, CWE-77
Platform
npm
Package
@anthropic-ai/claude-code
Disclosed
03.12.2025
Updated
11.10.2026 10:22

Sources and licenses

OSV / GitHub Advisory Database - GHSA-xq4m-mc3c-vvg3 - CC BY 4.0

Vulnerability history: @anthropic-ai/claude-code

All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.

All (29) in the archive
Total entries
29
First → latest
06.2025 10.2026
Without a fix
0
Exploited in attacks
0

Severity breakdown

  • High 23
  • Medium 4
  • Low 2

Disclosures per year

Severity:
  1. Claude Code: Plugin Hash Pin Bypass Allows Bypass of Hash Pinning
    High CVE-2026-86063 < 2.1.179 2.1.179
  2. Claude Code: Sandbox Escape via Git Worktree Path Confusion Allows Unsandboxed Code Execution
    High CVE-2026-55607 >= 2.1.38, < 2.1.163 2.1.163
  3. Claude Code: Trust Dialog Bypass via Git Worktree Spoofing Allows Arbitrary Code Execution
    High CVE-2026-40068 >= 2.1.63, < 2.1.84 2.1.84
  4. Claude Code: Sandbox Escape via Symlink Following Allows Arbitrary File Write Outside Workspace
    High · 10.0 CVE-2026-39861 < 2.1.64 2.1.64
  5. Claude Code has a Workspace Trust Dialog Bypass via Repo-Controlled Settings File
    High CVE-2026-33068 < 2.1.53 2.1.53
  6. Claude Code has Sandbox Escape via Persistent Configuration Injection in settings.json
    High CVE-2026-25725 < 2.1.2 2.1.2
  7. Claude Code Vulnerable to Command Injection via Piped sed Command Bypasses File Write Restrictions
    High CVE-2026-25723 < 2.0.55 2.0.55
  8. Claude Code Vulnerable to Command Injection via Directory Change Bypasses Write Protection
    High CVE-2026-25722 < 2.0.57 2.0.57
  9. Claude Code has a Command Injection in find Command Bypasses User Approval Prompt
    High CVE-2026-24887 < 2.0.72 2.0.72
  10. Claude Code has a Path Restriction Bypass via ZSH Clobber which Allows Arbitrary File Writes
    High CVE-2026-24053 < 2.0.74 2.0.74
  11. Claude Code has a Domain Validation Bypass which Allows Automatic Requests to Attacker-Controlled Domains
    High CVE-2026-24052 < 1.0.111 1.0.111
  12. Claude Code Command Validation Bypass Allows Arbitrary Code Execution this entry
    High CVE-2025-66032 < 1.0.93 1.0.93
  13. @anthropic-ai/claude-code has Sed Command Validation Bypass that Allows Arbitrary File Writes
    High CVE-2025-64755 < 2.0.31 2.0.31
  14. Claude Code vulnerable to command execution prior to startup trust dialog
    High CVE-2025-65099 < 1.0.39 1.0.39
  15. Claude Code can execute commands prior to the startup trust dialog
    High CVE-2025-59536 < 1.0.111 1.0.111
  16. Claude Code Vulnerable to Arbitrary Code Execution via Plugin Autoloading with Specific Yarn Versions
    High CVE-2025-59828 < 1.0.39 1.0.39
  17. Claude Code vulnerable to arbitrary code execution caused by maliciously configured git email
    High CVE-2025-59041 < 1.0.105 1.0.105
  18. Claude Code rg vulnerability does not protect against approval prompt bypass
    High CVE-2025-58764 < 1.0.105 1.0.105
  19. Claude Code Vulnerable to Arbitrary Code Execution Due to Insufficient Startup Warning
    High ghsa-ph6w-f82w-28w6 < 1.0.87 1.0.87
  20. Claude Code's Permissive Default Allowlist Enables Unauthorized File Read and Network Exfiltration in Claude Code
    High CVE-2025-55284 < 1.0.4 1.0.4
Show more (3) Showing 20 of 23

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