{"id":"CVE-2026-100540","aliases":["EUVD-2026-87510","GHSA-77rw-6qrm-8q2v","GHSA-h2qg-fxpv-82v6"],"status":"published","title":"OpenClaw Feishu before 2026.8.1 Authentication Bypass via Disabled Account","description":"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.","severity":{"version":"4.0","score":7.6,"vector":"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","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00232,"percentile":0.14114,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-863"],"published":"2026-09-26T02:18:38Z","modified":"2026-10-28T02:30:21Z","products":[{"vendor":"openclaw","product":"feishu"}],"references":[{"url":"https://github.com/openclaw/openclaw/security/advisories/GHSA-h2qg-fxpv-82v6","tags":["vendor-advisory","advisory"]},{"url":"https://www.vulncheck.com/advisories/openclaw-feishu-before-2026.8.1-authentication-bypass-via-disabled-account","tags":["third-party-advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-100540","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-77rw-6qrm-8q2v"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/100xxx/CVE-2026-100540.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-100540","title":"OpenClaw Feishu before 2026.8.1 Authentication Bypass via Disabled Account","description":"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.","status":"published","published":"2026-09-26T02:18:38.549Z","modified":"2026-10-08T15:21:45.39Z","cvss":[{"version":"4.0","score":7.6,"vector":"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","level":"high","assessor":"cna"},{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-863"],"updated_at":"2026-11-02T14:20:06.925367Z"}],"euvd":[{"id":"EUVD-2026-87510","description":"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.","status":"published","published":"2026-09-26T02:18:38Z","modified":"2026-10-08T15:21:45Z","cvss":[{"version":"4.0","score":7.6,"vector":"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","level":"high"}],"updated_at":"2026-11-02T17:27:32.18003Z"}],"ghsa":[{"id":"GHSA-77rw-6qrm-8q2v","title":"OpenClaw Feishu before 2026.8.1 fails to validate whether a configured default account is...","description":"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.","status":"published","published":"2026-09-26T03:30:24Z","modified":"2026-09-26T03:30:28Z","cvss":[{"version":"4.0","score":7.6,"vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high"},{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"medium"}],"cwes":["CWE-863"],"updated_at":"2026-11-02T15:12:29.177042Z"}],"nvd":[{"id":"CVE-2026-100540","description":"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.","status":"published","published":"2026-09-26T03:16:59.833Z","modified":"2026-10-08T16:16:56.36Z","cvss":[{"version":"4.0","score":7.6,"vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"},{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-863"],"updated_at":"2026-11-02T14:12:51.721923Z"}],"osv":[{"id":"CVE-2026-100540","title":"OpenClaw Feishu before 2026.8.1 Authentication Bypass via Disabled Account","description":"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.","status":"published","published":"2026-09-26T02:18:38.549Z","modified":"2026-10-28T02:30:21.054667833Z","cvss":[{"version":"4.0","score":7.6,"vector":"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","level":"high"}],"cwes":["CWE-863"],"updated_at":"2026-11-02T15:44:53.490346Z"}]}}