OpenClaw < 2026.3.28 - Brute Force Attack via Missing Rate Limiting on Webhook Shared Secret Authentication

{
  "id": "84c1bf2dd0f007e04c376fd7123419e30f830393277d38a91d4ec9cab440244b",
  "url": "https://osv.dev/vulnerability/CVE-2026-33580",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "OpenClaw < 2026.3.28 - Brute Force Attack via Missing Rate Limiting on Webhook Shared Secret Authentication",
    "summary": "OpenClaw before 2026.3.28 contains a missing rate limiting vulnerability in the Nextcloud Talk webhook authentication that allows attackers to brute-force weak shared secrets. Attackers who can reach the webhook endpoint can exploit this to forge inbound webhook events by repeatedly attempting authentication without throttling.",
    "evidence": "osv:CVE-2026-33580",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-33580",
      "aliases": [
        "CVE-2026-33580",
        "GHSA-9528-x887-j2fp"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/openclaw/openclaw",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
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                {
                  "fixed": "f9b1079283a8ee25a7cee77c8f8225d5c813bc30"
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                {
                  "fixed": "e403decb6e20091b5402780a7ccd2085f98aa3cd"
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              "database_specific": {
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                    "cpe": "cpe:2.3:a:openclaw:openclaw:*:*:*:*:*:node.js:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "2026.3.28"
                      }
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                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "e403decb6e20091b5402780a7ccd2085f98aa3cd"
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                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
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          "versions": [
            "v2026.3.24",
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          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-33580.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:50.743575665Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33580.json",
        "https://github.com/openclaw/openclaw/security/advisories/GHSA-9528-x887-j2fp",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-33580",
        "https://www.vulncheck.com/advisories/openclaw-brute-force-attack-via-missing-rate-limiting-on-webhook-shared-secret-authentication",
        "https://github.com/openclaw/openclaw/commit/e403decb6e20091b5402780a7ccd2085f98aa3cd"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-307"
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        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33580.json"
      }
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    "related_cves": [
      {
        "value": "CVE-2026-33580",
        "evidence": "/id"
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    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 519252,
  "published_at": "2026-03-31T14:10:33.057+00:00"
}