CVE-2026-42074

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 0.5%, top 58% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Elevated
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 9.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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
9.8
EG Score
9.8(medium)
EPSS
42.0%
KEV
Not listed

Published

May 12, 2026

Last Modified

June 3, 2026

Advisory Details (3)

Auto-updated Jun 20, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github_pr, github.
github Patch Available🟡 PoC Available

Sandbox Bypass via Model-Controlled `dangerouslyDisableSandbox` Input · Advisory · Gitlawb/openclaude · GitHub

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

fix: require trusted approval for sandbox override

Patch available: Gitlawb/openclaude v0.5.1 (PR #778 merged 2026-04-20)

https://github.com/Gitlawb/openclaude/pull/778
github_commit Patch Available

commit aab489055c53 (Gitlawb/openclaude)

Patch available: Gitlawb/openclaude v0.5.1 (contains commit aab489055c53)

https://github.com/Gitlawb/openclaude/commit/aab489055c53dd64369414116fe93226d2656273

Vendor Advisories for CVE-2026-42074(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFixed inDependents
openclaude—0.5.1—

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 10× in last 7d / 47× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 134 total refreshes for this CVE.

  1. 2026-07-16 17:03 UTCEPSS rescore
  2. 2026-07-16 14:53 UTCOSV refresh
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  1. 2026-06-28 02:20 UTCEG score recompute
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Frequently asked(5)

What is CVE-2026-42074?
CVE-2026-42074 is a critical vulnerability published on May 12, 2026. 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…
When was CVE-2026-42074 disclosed?
CVE-2026-42074 was first published in the National Vulnerability Database on May 12, 2026, with the most recent update on June 3, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-42074 actively exploited?
CVE-2026-42074 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 42.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-42074?
CVE-2026-42074 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-42074?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-42074, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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