CVE-2026-42074: OpenClaude is an open-source coding-agent command line interface for cloud and local model providers

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CRITICAL 9.8REMOTEUPGRADE

CVE-2026-42074 is a critical-severity flaw (CVSS 9.8) affecting openclaude. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 f

Why this priority

Critical severity
Public exploit reference
CISA SSVC: automatable with total technical impact
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.6% (top 52%)
CISA exploited list	No
Weakness	CWE-284, CWE-306
Published	2026-06-02
Last modified	2026-07-22

Publisher (CNA): GitHub, Inc. · Vendor: gitlawb

Last updated 2026-07-22 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-02 17:16 UTCPublished CVE record published
2026-07-22 19:10 UTCUpdated Record last modified

gitlawb openclaude UPGRADE

Affected: < 0.5.1

Fixed in: 0.5.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy openclaude || rpm -q openclaude || openclaude --version

2. UPGRADE to 0.5.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade openclaude

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade openclaude

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Exact fixes by distribution

npm · openclaude · FIXED · 0.5.1 · vulnerable: < 0.5.1 · source

npm install openclaude@">=0.5.1" npm ls openclaude

Fedora 46 · arm-none-eabi-binutils-cs · FIXED · 2.47-1.fc46 · FEDORA-2026-7498616952 · source

sudo dnf upgrade --advisory=FEDORA-2026-7498616952

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

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

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-42074?

openclaude: upgrade to 0.5.1. Exact commands for each OS are on this page.

Is CVE-2026-42074 being exploited?

CVE-2026-42074 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-42074 affect?

CVE-2026-42074 affects openclaude. Severity is critical (CVSS 9.8). 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 untru

How urgent is CVE-2026-42074?

Priority 59/100. Critical severity; Public exploit reference; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-35570 HIGH 8.4 UPGRADE OpenClaude is an open-source coding-agent command line interface for cloud and local model providers
CVE-2026-42073 MEDIUM 6.5 UPGRADE OpenClaude is an open-source coding-agent command line interface for cloud and local model providers

References

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