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brew-openclaw-cli-cve-2026-27670
Vulnerability from osv_homebrew
Published
2026-08-13 17:21
Modified
2026-09-12 09:47
Summary
OpenClaw: ZIP extraction race could write outside destination via parent symlink rebind
Details

Summary

ZIP extraction in OpenClaw could be raced into writing outside the intended destination directory via parent-directory symlink rebind between validation and write.

Affected Packages / Versions

  • Package: openclaw (npm)
  • Vulnerable versions: <= 2026.3.1
  • Latest published vulnerable version confirmed: 2026.3.1 (npm as of 2026-03-02)
  • Patched version: 2026.3.2 (released)

Technical Details

In src/infra/archive.ts, ZIP extraction previously validated output paths, then later opened/truncated the destination path in a separate step. A local race on parent-directory symlink state could redirect the final write outside the extraction root.

The fix hardens ZIP writes by binding writes to the opened file handle identity and avoiding the pre-write truncate race path, with shared fd realpath verification in src/infra/fs-safe.ts and regression coverage in src/infra/archive.test.ts.

Fix Commit(s)

  • 7dac9b05dd9d38dd3929637f26fa356fd8bdd107
Severity
8.7 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "fix": "bump",
        "range_state": "fixed",
        "upstream_fixed_in": "2026.3.2"
      },
      "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\nZIP extraction in OpenClaw could be raced into writing outside the intended destination directory via parent-directory symlink rebind between validation and write.\n\n### Affected Packages / Versions\n- Package: `openclaw` (npm)\n- Vulnerable versions: `\u003c= 2026.3.1`\n- Latest published vulnerable version confirmed: `2026.3.1` (npm as of 2026-03-02)\n- Patched version: `2026.3.2` (released)\n\n### Technical Details\nIn `src/infra/archive.ts`, ZIP extraction previously validated output paths, then later opened/truncated the destination path in a separate step. A local race on parent-directory symlink state could redirect the final write outside the extraction root.\n\nThe fix hardens ZIP writes by binding writes to the opened file handle identity and avoiding the pre-write truncate race path, with shared fd realpath verification in `src/infra/fs-safe.ts` and regression coverage in `src/infra/archive.test.ts`.\n\n### Fix Commit(s)\n- `7dac9b05dd9d38dd3929637f26fa356fd8bdd107`",
  "id": "BREW-openclaw-cli-CVE-2026-27670",
  "modified": "2026-09-12T09:47:35Z",
  "published": "2026-08-13T17:21:32Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-r54r-wmmq-mh84"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openclaw/openclaw/commit/7dac9b05dd9d38dd3929637f26fa356fd8bdd107"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/openclaw/openclaw"
    }
  ],
  "schema_version": "1.7.3",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "OpenClaw: ZIP extraction race could write outside destination via parent symlink rebind",
  "upstream": [
    "GHSA-r54r-wmmq-mh84",
    "CVE-2026-27670",
    "CVE-2026-28483"
  ]
}



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