{"id":"CVE-2026-101084","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-101084","generatedAt":"2026-10-28T01:45:45.924Z","title":"obot versions before v0.21.1 fail to enforce Access Control Rules on the /mcp-connect endpoint, allowing any authenticated user to connect to restricted MCP servers if they possess the server ID.","description":"obot versions before v0.21.1 fail to enforce Access Control Rules on the /mcp-connect endpoint, allowing any authenticated user to connect to restricted MCP servers if they possess the server ID. Attackers can bypass authorization checks to access and manipulate sensitive backend systems through MCP tool calls using stored OAuth credentials.","published":"2026-09-27T21:17:02.000Z","lastModified":"2026-09-30T23:16:57.000Z","status":"Deferred","sourceIdentifier":"disclosure@vulncheck.com","cvss":{"version":"4.0","score":9.3,"severity":"CRITICAL","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-639"],"affected":[],"epss":{"score":0.00346,"percentile":0.27892,"date":"2026-10-26","history":[{"date":"2026-09-28","score":0.00279,"percentile":0.18276}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.35%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-09-27T21:17:02.000Z","detail":{"score":"9.3","severity":"CRITICAL","publishedAt":"2026-09-27T21:17:02.163Z"},"summary":"New CVE, critical severity (CVSS 9.3)."}],"references":[{"url":"https://github.com/obot-platform/obot/security/advisories/GHSA-vw82-7fv8-r6gp","source":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/obot-before-0.21.1-authorization-bypass-via-mcp-connect","source":"disclosure@vulncheck.com"},{"url":"https://github.com/obot-platform/obot/security/advisories/GHSA-vw82-7fv8-r6gp","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-101084","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}