CVE-2026-35570CWE-22CWE-284

OpenClaude has Sandbox Bypass via Early-Exit Logic Flaw that Allows Path Traversal

High · published April 20, 2026

CVSS v3.1
8.4
EPSS
0%
Percentile
7.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
8.4 · HIGH
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00187 · 7.9th percentile
Weaknesses
CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'); CWE-284 · Improper Access Control
Published
2026-04-20T23:24Z
EPSS history
Timeline
  • 20 APR 23:24Z
    OpenClaude has Sandbox Bypass via Early-Exit Logic Flaw that Allows Path Traversal
    cvelistv5