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brew-openclaw-cli-cve-2026-27545
Vulnerability from osv_homebrew
Published
2026-08-13 17:21
Modified
2026-09-17 17:24
Summary
OpenClaw: Node system.run approval bypass via parent-symlink cwd rebind
Details

Summary

For host=node executions, approval context could be bypassed after approval-time by rebinding a writable parent symlink in cwd while preserving the visible cwd string.

Affected Packages / Versions

  • Package: openclaw (npm)
  • Affected: <= 2026.2.25
  • Fixed: >= 2026.2.26 (planned next npm release)

Impact

A command approved for one filesystem location could execute from a different location if a mutable parent symlink changed between approval and execution.

Fix

  • Added immutable approval-time plan preparation (system.run.prepare) and systemRunPlanV2 canonical fields (argv, cwd, agentId, sessionKey).
  • Enforced canonical plan values through approval request storage and forwarding-time sanitization.
  • Rejected mutable parent-symlink path components during approval-plan building to block symlink rebind bypass.
  • Follow-up refactors centralized command catalogs and approval context/error handling to reduce future drift.

Fix Commit(s)

  • 78a7ff2d50fb3bcef351571cb5a0f21430a340c1
  • d82c042b09727a6148f3ca651b254c4a677aff26
  • d06632ba45a8482192792c55d5ff0b2e21abb0a7
  • 4e690e09c746408b5e27617a20cb3fdc5190dbda
  • 4b4718c8dfce2e2c48404aa5088af7c013bed60b

Release Process Note

patched_versions is pre-set to the planned next release (2026.2.26). Once npm openclaw@2026.2.26 is published, publish this advisory directly without further version-field edits.

OpenClaw thanks @tdjackey for reporting.

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": "2026.2.26"
      },
      "package": {
        "ecosystem": "Homebrew",
        "name": "openclaw-cli",
        "purl": "pkg:brew/openclaw-cli"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2026.1.29"
            },
            {
              "fixed": "2026.2.26"
            }
          ],
          "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\nFor `host=node` executions, approval context could be bypassed after approval-time by rebinding a writable parent symlink in `cwd` while preserving the visible `cwd` string.\n\n## Affected Packages / Versions\n- Package: `openclaw` (npm)\n- Affected: `\u003c= 2026.2.25`\n- Fixed: `\u003e= 2026.2.26` (planned next npm release)\n\n## Impact\nA command approved for one filesystem location could execute from a different location if a mutable parent symlink changed between approval and execution.\n\n## Fix\n- Added immutable approval-time plan preparation (`system.run.prepare`) and `systemRunPlanV2` canonical fields (`argv`, `cwd`, `agentId`, `sessionKey`).\n- Enforced canonical plan values through approval request storage and forwarding-time sanitization.\n- Rejected mutable parent-symlink path components during approval-plan building to block symlink rebind bypass.\n- Follow-up refactors centralized command catalogs and approval context/error handling to reduce future drift.\n\n## Fix Commit(s)\n- `78a7ff2d50fb3bcef351571cb5a0f21430a340c1`\n- `d82c042b09727a6148f3ca651b254c4a677aff26`\n- `d06632ba45a8482192792c55d5ff0b2e21abb0a7`\n- `4e690e09c746408b5e27617a20cb3fdc5190dbda`\n- `4b4718c8dfce2e2c48404aa5088af7c013bed60b`\n\n## Release Process Note\n`patched_versions` is pre-set to the planned next release (`2026.2.26`). Once npm `openclaw@2026.2.26` is published, publish this advisory directly without further version-field edits.\n\nOpenClaw thanks @tdjackey for reporting.",
  "id": "BREW-openclaw-cli-CVE-2026-27545",
  "modified": "2026-09-17T17:24:13Z",
  "published": "2026-08-13T17:21:32Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-f7ww-2725-qvw2"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-27545"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openclaw/openclaw/commit/4b4718c8dfce2e2c48404aa5088af7c013bed60b"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openclaw/openclaw/commit/4e690e09c746408b5e27617a20cb3fdc5190dbda"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openclaw/openclaw/commit/78a7ff2d50fb3bcef351571cb5a0f21430a340c1"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openclaw/openclaw/commit/d06632ba45a8482192792c55d5ff0b2e21abb0a7"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openclaw/openclaw/commit/d82c042b09727a6148f3ca651b254c4a677aff26"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/openclaw/openclaw"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/openclaw-approval-bypass-via-parent-symlink-current-working-directory-rebind"
    }
  ],
  "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: Node system.run approval bypass via parent-symlink cwd rebind",
  "upstream": [
    "GHSA-f7ww-2725-qvw2",
    "CVE-2026-27545"
  ]
}



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