GHSA-9528-X887-J2FP

Vulnerability from github – Published: 2026-03-31 23:59 – Updated: 2026-04-06 22:53
VLAI?
Summary
OpenClaw's Nextcloud Talk webhook missing rate limiting on shared secret authentication
Details

Summary

Nextcloud Talk webhook signature failures were not throttled even though the integration relies on an operator-configured shared secret that may be weak.

Impact

An attacker who could reach the webhook endpoint could brute-force weak secrets online and then forge inbound webhook events.

Affected Component

extensions/nextcloud-talk/src/monitor.ts

Fixed Versions

  • Affected: <= 2026.3.24
  • Patched: >= 2026.3.28
  • Latest stable 2026.3.28 contains the fix.

Fix

Fixed by commit e403decb6e (nextcloud-talk: throttle repeated webhook auth failures).

OpenClaw thanks @AntAISecurityLab for reporting.

Show details on source website
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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 2026.3.24"
      },
      "package": {
        "ecosystem": "npm",
        "name": "openclaw"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2026.3.28"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-33580"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-307"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-31T23:59:17Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "## Summary\n\nNextcloud Talk webhook signature failures were not throttled even though the integration relies on an operator-configured shared secret that may be weak.\n\n## Impact\n\nAn attacker who could reach the webhook endpoint could brute-force weak secrets online and then forge inbound webhook events.\n\n## Affected Component\n\n`extensions/nextcloud-talk/src/monitor.ts`\n\n## Fixed Versions\n\n- Affected: `\u003c= 2026.3.24`\n- Patched: `\u003e= 2026.3.28`\n- Latest stable `2026.3.28` contains the fix.\n\n## Fix\n\nFixed by commit `e403decb6e` (`nextcloud-talk: throttle repeated webhook auth failures`).\n\nOpenClaw thanks @AntAISecurityLab for reporting.",
  "id": "GHSA-9528-x887-j2fp",
  "modified": "2026-04-06T22:53:25Z",
  "published": "2026-03-31T23:59:17Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-9528-x887-j2fp"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33580"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openclaw/openclaw/commit/e403decb6e20091b5402780a7ccd2085f98aa3cd"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/openclaw/openclaw"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openclaw/openclaw/releases/tag/v2026.3.28"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/openclaw-brute-force-attack-via-missing-rate-limiting-on-webhook-shared-secret-authentication"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [],
  "summary": "OpenClaw\u0027s Nextcloud Talk webhook missing rate limiting on shared secret authentication"
}


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