GHSA-H97F-6PQJ-Q452

Vulnerability from github – Published: 2026-03-03 21:48 – Updated: 2026-03-03 21:48
VLAI
Summary
OpenClaw has a IPv6 multicast SSRF classifier bypass
Details

Summary

OpenClaw's SSRF IP classifier did not treat IPv6 multicast literals (ff00::/8) as blocked/private-internal. This allowed literal multicast hosts to pass SSRF preflight checks.

Impact

A bypass in address classification existed for IPv6 multicast literals. OpenClaw's network fetch/navigation paths are constrained to HTTP/HTTPS and this was triaged as low-severity defense-in-depth hardening.

Affected Packages / Versions

  • Package: openclaw (npm)
  • Affected versions: <= 2026.2.24
  • Patched versions: >= 2026.2.25

Technical Details

The IPv6 private/internal range set omitted multicast, so addresses like ff02::1 and ff05::1:3 were not classified as blocked by the shared SSRF classifier.

Fix Commit(s)

  • baf656bc6fd7f83b6033e6dbc2548ec75028641f

Release Process Note

patched_versions is pre-set to the planned next npm release (2026.2.25). Once that release is published on npm, the advisory is published.

OpenClaw thanks @zpbrent for reporting.

Severity
6.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N
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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 2026.2.24"
      },
      "package": {
        "ecosystem": "npm",
        "name": "openclaw"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2026.2.25"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-918"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-03T21:48:55Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "### Summary\nOpenClaw\u0027s SSRF IP classifier did not treat IPv6 multicast literals (`ff00::/8`) as blocked/private-internal. This allowed literal multicast hosts to pass SSRF preflight checks.\n\n### Impact\nA bypass in address classification existed for IPv6 multicast literals. OpenClaw\u0027s network fetch/navigation paths are constrained to HTTP/HTTPS and this was triaged as low-severity defense-in-depth hardening.\n\n### Affected Packages / Versions\n- Package: `openclaw` (npm)\n- Affected versions: `\u003c= 2026.2.24`\n- Patched versions: `\u003e= 2026.2.25` \n\n### Technical Details\nThe IPv6 private/internal range set omitted `multicast`, so addresses like `ff02::1` and `ff05::1:3` were not classified as blocked by the shared SSRF classifier.\n\n### Fix Commit(s)\n- `baf656bc6fd7f83b6033e6dbc2548ec75028641f`\n\n### Release Process Note\n`patched_versions` is pre-set to the planned next npm release (`2026.2.25`). Once that release is published on npm, the advisory is published.\n\nOpenClaw thanks @zpbrent for reporting.",
  "id": "GHSA-h97f-6pqj-q452",
  "modified": "2026-03-03T21:48:55Z",
  "published": "2026-03-03T21:48:55Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-h97f-6pqj-q452"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openclaw/openclaw/commit/baf656bc6fd7f83b6033e6dbc2548ec75028641f"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/openclaw/openclaw"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "OpenClaw has a IPv6 multicast SSRF classifier bypass"
}



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