CVE-2026-42074 | THREATINT

Description

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.

PUBLISHED Reserved 2026-04-23 | Published 2026-06-02 | Updated 2026-06-02 | Assigner GitHub_M

CRITICAL: 9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Problem types

CWE-306: Missing Authentication for Critical Function

CWE-284: Improper Access Control

Product status

< 0.5.1

affected

References

github.com/...claude/security/advisories/GHSA-m77w-p5jj-xmhg exploit

github.com/...claude/security/advisories/GHSA-m77w-p5jj-xmhg

github.com/Gitlawb/openclaude/pull/778

github.com/...ommit/aab489055c53dd64369414116fe93226d2656273

cve.org (CVE-2026-42074)

nvd.nist.gov (CVE-2026-42074)

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