CVE-2026-42074

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.

CVSS v3.1 Score

9.8

CRITICAL

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

EPSS — Exploit Prediction

0.0054

Probability of exploitation

0.42%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-284 CWE-284

CWE-306 Missing Authentication

Affected Products

Vendor	Product	Versions
gitlawb	openclaude	< 0.5.1

References

Advisories & Patches

https://github.com/Gitlawb/openclaude/commit/aab489055c53dd64369414116fe93226d2656273 https://github.com/Gitlawb/openclaude/pull/778 https://github.com/Gitlawb/openclaude/security/advisories/GHSA-m77w-p5jj-xmhg https://github.com/Gitlawb/openclaude/security/advisories/GHSA-m77w-p5jj-xmhg

Exploits

https://github.com/Gitlawb/openclaude/security/advisories/GHSA-m77w-p5jj-xmhg https://github.com/Gitlawb/openclaude/security/advisories/GHSA-m77w-p5jj-xmhg

Frequently Asked Questions

What is CVE-2026-42074? +

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. It has a CVSS v3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2026-42074? +

CVE-2026-42074 has a CVSS v3.1 score of 9.8 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately. The EPSS score is 0.0054, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-42074? +

CVE-2026-42074 affects products from gitlawb, specifically: openclaude. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-42074? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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