{"id":"CVE-2026-103758","state":"PUBLISHED","title":"Obot 0.21.1 through 0.24.1 Authorization Bypass via /mcp-connect-composite/ Route","description":"Obot 0.21.1 through 0.24.1 contains an authorization bypass vulnerability that allows authenticated users to reach MCP servers because the checkUI deny list omits the /mcp-connect-composite/ route. Basic-role users with a composite MCP ID can proxy requests through mcpGateway.Proxy to invoke tools on MCP servers restricted by Access Control Rules.","publishedAt":"2026-10-01T10:42:26.638Z","updatedAt":"2026-10-01T14:35:10.239Z","severity":{"score":8.6,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","source":"VulnCheck"},"assigner":"VulnCheck","products":["obot-platform obot"],"affected":[{"vendor":"obot-platform","product":"obot","packageURL":"pkg:golang/github.com/obot-platform/obot","defaultStatus":"unaffected","versions":[{"version":"0.21.1","status":"affected","lessThanOrEqual":"0.24.1","versionType":"semver"}]}],"references":["https://github.com/obot-platform/obot/security/advisories/GHSA-6fwv-3h4c-37j9","https://www.vulncheck.com/advisories/obot-0.21.1-through-0.24.1-authorization-bypass-via-mcp-connect-composite-route"],"weaknesses":["CWE-863"],"ingestedAt":"2026-10-29T20:10:23.711Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/103xxx/CVE-2026-103758.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-103758","state":"PUBLISHED","datePublished":"2026-10-01T10:42:26.638Z","dateUpdated":"2026-10-01T14:35:10.239Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-10-01T10:39:47.844Z"},"containers":{"cna":{"title":"Obot 0.21.1 through 0.24.1 Authorization Bypass via /mcp-connect-composite/ Route","descriptions":[{"lang":"en","value":"Obot 0.21.1 through 0.24.1 contains an authorization bypass vulnerability that allows authenticated users to reach MCP servers because the checkUI deny list omits the /mcp-connect-composite/ route. Basic-role users with a composite MCP ID can proxy requests through mcpGateway.Proxy to invoke tools on MCP servers restricted by Access Control Rules."}],"affected":[{"vendor":"obot-platform","product":"obot","packageURL":"pkg:golang/github.com/obot-platform/obot","defaultStatus":"unaffected","versions":[{"version":"0.21.1","status":"affected","lessThanOrEqual":"0.24.1","versionType":"semver"}]}],"references":[{"url":"https://github.com/obot-platform/obot/security/advisories/GHSA-6fwv-3h4c-37j9","tags":["vendor-advisory"],"name":"GitHub Security Advisory (GHSA-6fwv-3h4c-37j9)"},{"url":"https://www.vulncheck.com/advisories/obot-0.21.1-through-0.24.1-authorization-bypass-via-mcp-connect-composite-route","name":"VulnCheck Advisory: Obot 0.21.1 through 0.24.1 Authorization Bypass via /mcp-connect-composite/ Route","tags":["third-party-advisory"]}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":8.6,"baseSeverity":"HIGH"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"NONE","baseScore":8.1,"baseSeverity":"HIGH"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-863","lang":"en","description":"Incorrect Authorization","type":"CWE"}]}],"providerMetadata":{"shortName":"VulnCheck","orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateUpdated":"2026-10-01T10:42:26.638Z"},"datePublic":"2026-09-17T00:00:00.000Z","credits":[{"lang":"en","value":"arpitjain099","type":"reporter"}],"x_generator":{"engine":"vulncheck-endgame"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-01T14:34:42.584937Z","id":"CVE-2026-103758","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-01T14:35:10.239Z"}}]}}}