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BREW-OPENCLAW-CLI-CVE-20… (GHSA-FG3M-VHRR-8GJ6)

Vulnerability from osv_homebrew – Published: 2026-08-13 17:21 – Updated: 2026-09-12 09:47 – Source website
VLAI
Summary
OpenClaw has Windows Lobster shell fallback command injection in constrained fallback path
Details

Summary

On Windows, the Lobster extension previously retried certain spawn failures (ENOENT/EINVAL) with shell: true for wrapper compatibility. In that fallback path, tool-provided arguments could be interpreted by cmd.exe if fallback was triggered.

Affected Packages / Versions

  • Package: openclaw (npm)
  • Latest published version at triage: 2026.2.17
  • Affected range: >= 2026.1.21 <= 2026.2.17
  • Patched version: 2026.2.19 (pre-set for next release)

Fix

The Windows shell fallback was removed. Wrapper compatibility is preserved by resolving .cmd/.bat shims to a concrete Node entrypoint (or executable) and executing with explicit argv (no shell). If a safe entrypoint cannot be resolved, execution now fails closed with a guided error.

Fix Commit(s)

  • ba7be018da354ea9f803ed356d20464df0437916

Severity Context

This issue requires Windows plus fallback-triggering conditions, and argument control through a local operator-defined workflow.

OpenClaw thanks @tdjackey for reporting.

Severity
5.1 (Medium)
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "fix": "bump",
        "range_state": "fixed",
        "upstream_fixed_in": "2026.2.19"
      },
      "package": {
        "ecosystem": "Homebrew",
        "name": "openclaw-cli",
        "purl": "pkg:brew/openclaw-cli"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2026.7.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "confidence": "high",
    "source": "matched",
    "strategy": "registry",
    "upstream_evidence": [
      {
        "ecosystem": "npm",
        "key": "pkg:npm/openclaw@2026.9.4",
        "name": "openclaw",
        "strategy": "registry",
        "subject_version": "2026.9.4"
      }
    ]
  },
  "details": "### Summary\nOn Windows, the Lobster extension previously retried certain spawn failures (`ENOENT`/`EINVAL`) with `shell: true` for wrapper compatibility. In that fallback path, tool-provided arguments could be interpreted by `cmd.exe` if fallback was triggered.\n\n### Affected Packages / Versions\n- Package: `openclaw` (npm)\n- Latest published version at triage: `2026.2.17`\n- Affected range: `\u003e= 2026.1.21 \u003c= 2026.2.17`\n- Patched version: `2026.2.19` (pre-set for next release)\n\n### Fix\nThe Windows shell fallback was removed. Wrapper compatibility is preserved by resolving `.cmd`/`.bat` shims to a concrete Node entrypoint (or executable) and executing with explicit argv (no shell). If a safe entrypoint cannot be resolved, execution now fails closed with a guided error.\n\n### Fix Commit(s)\n- `ba7be018da354ea9f803ed356d20464df0437916`\n\n### Severity Context\nThis issue requires Windows plus fallback-triggering conditions, and argument control through a local operator-defined workflow. \n\nOpenClaw thanks @tdjackey for reporting.",
  "id": "BREW-openclaw-cli-CVE-2026-31995",
  "modified": "2026-09-12T09:47:35Z",
  "published": "2026-08-13T17:21:32Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-fg3m-vhrr-8gj6"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31995"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openclaw/openclaw/commit/ba7be018da354ea9f803ed356d20464df0437916"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/openclaw/openclaw"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/openclaw-command-injection-via-windows-shell-fallback-in-lobster-extension"
    }
  ],
  "schema_version": "1.7.3",
  "severity": [
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "OpenClaw has Windows Lobster shell fallback command injection in constrained fallback path",
  "upstream": [
    "GHSA-fg3m-vhrr-8gj6",
    "CVE-2026-31995"
  ]
}



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