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OpenClaw Feishu before 2026.8.1 Authentication Bypass via Disabled Account

Type: advisorySources: OSV

OpenClaw Feishu before 2026.8.1 fails to validate whether a configured default account is disabled before selecting it for model tool operations. Attackers can exploit multi-account setups where a disabled default account retains credentials to read or modify Feishu resources through a revoked identity.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2026-100540
Confirmed fixed CVEs
Not specified
Updated in this feed
2 Nov 2026, 16:31 UTC · Revision 1

Source evidence

OpenClaw Feishu before 2026.8.1 Authentication Bypass via Disabled Account

core-osv · Original source

Published 26 Sept 2026, 02:18 UTC

OpenClaw Feishu before 2026.8.1 fails to validate whether a configured default account is disabled before selecting it for model tool operations. Attackers can exploit multi-account setups where a disabled default account retains credentials to read or modify Feishu resources through a revoked identity.

osv:CVE-2026-100540
Complete source record
{
  "id": "80fa65ef9d7fd08e597ca071d69680633c71684e67c011efa9663295be0901bc",
  "url": "https://osv.dev/vulnerability/CVE-2026-100540",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "OpenClaw Feishu before 2026.8.1 Authentication Bypass via Disabled Account",
    "summary": "OpenClaw Feishu before 2026.8.1 fails to validate whether a configured default account is disabled before selecting it for model tool operations. Attackers can exploit multi-account setups where a disabled default account retains credentials to read or modify Feishu resources through a revoked identity.",
    "evidence": "osv:CVE-2026-100540",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-100540",
      "aliases": [
        "CVE-2026-100540",
        "GHSA-h2qg-fxpv-82v6"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/openclaw/openclaw",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "ea806575e6450e4d1efdfc72c19f04be982a1b9b"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "2026.8.1"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "2026.8.1"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
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          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-100540.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:21.054667833Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/100xxx/CVE-2026-100540.json",
        "https://github.com/openclaw/openclaw/security/advisories/GHSA-h2qg-fxpv-82v6",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-100540",
        "https://www.vulncheck.com/advisories/openclaw-feishu-before-2026.8.1-authentication-bypass-via-disabled-account"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-863"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/100xxx/CVE-2026-100540.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-100540",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 487179,
  "published_at": "2026-09-26T02:18:38.549+00:00"
}