CVE-2026-42074CWE-284CWE-306

OpenClaude: Sandbox Bypass via Model-Controlled `dangerouslyDisableSandbox` Input

Critical · published June 2, 2026

CVSS v4.0
9.3
EPSS
1%
Percentile
53.4
In the wild
Unconfirmed
What it is

OpenClaude is an open-source coding-agent command line interface for cloud and local model providers. Prior to version 0.5.1, the dangerouslyDisableSandbox parameter is exposed as part of the BashTool input schema, meaning the LLM (an untrusted principal per the project's own threat model) can set it to true in any tool_use response. Combined with the default allowUnsandboxedCommands: true setting, a prompt-injected model can escape the sandbox for any arbitrary command, achieving full host-level code execution. This issue has been patched in version 0.5.1.

The record
Technical detail
CVSS v4.0
9.3 · CRITICAL
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS
0.00722 · 53.4th percentile
Weaknesses
CWE-284 · Improper Access Control; CWE-306 · Missing Authentication for Critical Function
Published
2026-06-02T15:38Z
EPSS history
Timeline
  • 02 JUN 15:38Z
    OpenClaude: Sandbox Bypass via Model-Controlled `dangerouslyDisableSandbox` Input
    cvelistv5