CVE-2026-35570 HIGH

CVE-2026-35570: OpenClaude has Sandbox Bypass via Early-Exit Logic Flaw that Allows Path Traversal

Vendor Gitlawb
Product openclaude
Weakness CWE-22 · Path traversal
Published April 20, 2026
Last update April 21, 2026

CVSS base score

8.4/10
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

What the vulnerability does

01Description

OpenClaude is an open-source coding-agent command line interface for cloud and local model providers. Versions prior to 0.5.1 have a logic flaw in `bashToolHasPermission()` inside `src/tools/BashTool/bashPermissions.ts`. When the sandbox auto-allow feature is active and no explicit deny rule is configured, the function returns an `allow` result immediately — before the path constraint filter (`checkPathConstraints`) is ever evaluated. This allows commands containing path traversal sequences (e.g., `../../../../../etc/passwd`) to bypass directory restrictions entirely. Version 0.5.1 contains a patch for the issue.

Key dates

02Disclosure timeline

April 20, 2026 CVE published
April 21, 2026 Record updated