DEV Community

CVE Reports
CVE Reports

Posted on • Originally published at cvereports.com

CVE-2026-34425: CVE-2026-34425: Validation Bypass in OpenClaw Shell-Bleed Protection

#security #cve #cybersecurity

CVE-2026-34425: Validation Bypass in OpenClaw Shell-Bleed Protection

Vulnerability ID: CVE-2026-34425
CVSS Score: 5.4
Published: 2026-04-06

OpenClaw versions prior to commit 8aceaf5d0f0ec552b75a792f7f0a3bfa5b091513 contain a validation bypass vulnerability in the preflight script execution checker. The fail-open design of the command parser allows malicious shell syntax to evade detection and execute arbitrary code. The patch implements a robust, fail-closed command tokenizer.

TL;DR

A fail-open logic flaw in OpenClaw's preflight script validator allows attackers to bypass 'Shell-Bleed' protections using complex shell syntax, enabling execution of unvalidated script content.

⚠️ Exploit Status: POC

Technical Details

  • CWE ID: CWE-184
  • Attack Vector: Network
  • CVSS v3.1: 5.4
  • CVSS v4.0: 5.3
  • EPSS Score: 0.00048
  • KEV Listed: False
  • Patch Status: Patched

Affected Systems

  • OpenClaw (npm) preflight validation mechanism
  • OpenClaw Shell-Bleed protection modules
  • OpenClaw: Prior to commit 8aceaf5d0f0ec552b75a792f7f0a3bfa5b091513 (Fixed in: Commit 8aceaf5)

Code Analysis

Commit: 8aceaf5

Fix Shell-Bleed bypass via tokenizer rewrite

Mitigation Strategies

  • Upgrade OpenClaw components to the latest patched release
  • Implement application-edge filtering for complex shell syntax and shell wrappers
  • Isolate execution agents in restricted sandbox environments
  • Limit environment variable exposure within the execution context

Remediation Steps:

  1. Identify all deployments utilizing vulnerable versions of OpenClaw.
  2. Apply the patch from commit 8aceaf5d0f0ec552b75a792f7f0a3bfa5b091513 by updating the package via npm.
  3. Validate that the new fail-closed tokenizer does not break legitimate execution workloads relying on complex shell syntax.
  4. Monitor execution logs for rejected complex shell commands indicative of bypass attempts.

References

Read the full report for CVE-2026-34425 on our website for more details including interactive diagrams and full exploit analysis.

Top comments (0)