GHSA-FH32-73R9-RGH5

Vulnerability from github – Published: 2026-04-07 18:15 – Updated: 2026-05-06 19:03
VLAI?
Summary
OpenClaw: Trailing-dot localhost CDP hosts could bypass remote loopback protections
Details

Summary

Before OpenClaw 2026.4.2, remote CDP discovery could return a trailing-dot localhost host such as localhost. and bypass OpenClaw's loopback-host normalization. That let a non-loopback remote CDP profile pivot the follow-up connection back onto localhost.

Impact

A hostile discovery response could retarget authenticated browser control toward a localhost-resolving endpoint on the OpenClaw host. This weakened the existing remote-CDP loopback protection and could expose localhost-backed browser state.

Affected Packages / Versions

  • Package: openclaw (npm)
  • Affected versions: <= 2026.4.1
  • Patched versions: >= 2026.4.2
  • Latest published npm version: 2026.4.1

Fix Commit(s)

  • 9c22d636697336a6b22b0ae24798d8b8325d7828 — normalize localhost absolute-form CDP hosts before loopback checks

Release Process Note

The fix is present on main and is staged for OpenClaw 2026.4.2. Publish this advisory after the 2026.4.2 npm release is live.

Thanks @smaeljaish771 for reporting.

Severity ?
5.8 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N
6.9 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N
Show details on source website
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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 2026.4.1"
      },
      "package": {
        "ecosystem": "npm",
        "name": "openclaw"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2026.4.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-41372"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-20",
      "CWE-639"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-04-07T18:15:56Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "## Summary\n\nBefore OpenClaw 2026.4.2, remote CDP discovery could return a trailing-dot localhost host such as `localhost.` and bypass OpenClaw\u0027s loopback-host normalization. That let a non-loopback remote CDP profile pivot the follow-up connection back onto localhost.\n\n## Impact\n\nA hostile discovery response could retarget authenticated browser control toward a localhost-resolving endpoint on the OpenClaw host. This weakened the existing remote-CDP loopback protection and could expose localhost-backed browser state.\n\n## Affected Packages / Versions\n\n- Package: `openclaw` (npm)\n- Affected versions: `\u003c= 2026.4.1`\n- Patched versions: `\u003e= 2026.4.2`\n- Latest published npm version: `2026.4.1`\n\n## Fix Commit(s)\n\n- `9c22d636697336a6b22b0ae24798d8b8325d7828` \u2014 normalize localhost absolute-form CDP hosts before loopback checks\n\n## Release Process Note\n\nThe fix is present on `main` and is staged for OpenClaw `2026.4.2`. Publish this advisory after the `2026.4.2` npm release is live.\n\nThanks @smaeljaish771 for reporting.",
  "id": "GHSA-fh32-73r9-rgh5",
  "modified": "2026-05-06T19:03:55Z",
  "published": "2026-04-07T18:15:56Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-fh32-73r9-rgh5"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-41372"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openclaw/openclaw/commit/9c22d636697336a6b22b0ae24798d8b8325d7828"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/openclaw/openclaw"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/openclaw-loopback-protection-bypass-via-trailing-dot-localhost-in-cdp-discovery"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "OpenClaw: Trailing-dot localhost CDP hosts could bypass remote loopback protections"
}


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