{"id":"CVE-2026-105698","state":"PUBLISHED","title":"Langflow: Cross-user flow access and vertex execution via deprecated /api/v1/build/{flow_id}/vertices endpoints","description":"Langflow is a tool for building and deploying AI-powered agents and workflows. From 1.0.0 until 1.10.1, Langflow did not verify flow ownership in the deprecated POST /api/v1/build/{flow_id}/vertices and POST /api/v1/build/{flow_id}/vertices/{vertex_id} handlers. Through version 1.7.1, an unauthenticated caller who knew another user's flow UUID could reach these handlers; from version 1.7.2 through 1.10.0, callers had to authenticate but needed no elevated privileges. Such a caller could cause retrieve_vertices_order to load and cache the private graph, enumerate its vertex identifiers, and use build_vertex to execute selected vertices and receive their results. build_graph_from_db_no_cache performed a primary-key lookup without an owner filter. This could disclose private flow structure, configured values, and selected outputs and could trigger victim-configured side effects and build-history records, although it did not expose the victim's variable-store credentials or permit modification of the stored flow. This issue is fixed in Langflow 1.10.1 and langflow-base 0.10.1.","publishedAt":"2026-10-05T20:20:27.287Z","updatedAt":"2026-10-06T13:58:36.614Z","severity":{"score":5.4,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["langflow-ai langflow","langflow-ai langflow-base"],"affected":[{"vendor":"langflow-ai","product":"langflow","versions":[{"version":">= 1.0.0, < 1.10.1","status":"affected"}]},{"vendor":"langflow-ai","product":"langflow-base","versions":[{"version":"< 0.10.1","status":"affected"}]}],"references":["https://github.com/langflow-ai/langflow/security/advisories/GHSA-gh98-4phw-6fmw","https://github.com/langflow-ai/langflow/pull/13153","https://github.com/langflow-ai/langflow/commit/fb3d6ec90b1e4d52eaa40915a64b1f86b6542f55","https://github.com/langflow-ai/langflow/releases/tag/v1.10.1"],"weaknesses":["CWE-639","CWE-862"],"ingestedAt":"2026-10-29T20:10:23.711Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/105xxx/CVE-2026-105698.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-105698","state":"PUBLISHED","datePublished":"2026-10-05T20:20:27.287Z","dateUpdated":"2026-10-06T13:58:36.614Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-10-05T17:48:58.627Z"},"containers":{"cna":{"title":"Langflow: Cross-user flow access and vertex execution via deprecated /api/v1/build/{flow_id}/vertices endpoints","descriptions":[{"lang":"en","value":"Langflow is a tool for building and deploying AI-powered agents and workflows. From 1.0.0 until 1.10.1, Langflow did not verify flow ownership in the deprecated POST /api/v1/build/{flow_id}/vertices and POST /api/v1/build/{flow_id}/vertices/{vertex_id} handlers. Through version 1.7.1, an unauthenticated caller who knew another user's flow UUID could reach these handlers; from version 1.7.2 through 1.10.0, callers had to authenticate but needed no elevated privileges. Such a caller could cause retrieve_vertices_order to load and cache the private graph, enumerate its vertex identifiers, and use build_vertex to execute selected vertices and receive their results. build_graph_from_db_no_cache performed a primary-key lookup without an owner filter. This could disclose private flow structure, configured values, and selected outputs and could trigger victim-configured side effects and build-history records, although it did not expose the victim's variable-store credentials or permit modification of the stored flow. This issue is fixed in Langflow 1.10.1 and langflow-base 0.10.1."}],"affected":[{"vendor":"langflow-ai","product":"langflow","versions":[{"version":">= 1.0.0, < 1.10.1","status":"affected"}]},{"vendor":"langflow-ai","product":"langflow-base","versions":[{"version":"< 0.10.1","status":"affected"}]}],"references":[{"url":"https://github.com/langflow-ai/langflow/security/advisories/GHSA-gh98-4phw-6fmw","name":"https://github.com/langflow-ai/langflow/security/advisories/GHSA-gh98-4phw-6fmw","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/langflow-ai/langflow/pull/13153","name":"https://github.com/langflow-ai/langflow/pull/13153","tags":["x_refsource_MISC"]},{"url":"https://github.com/langflow-ai/langflow/commit/fb3d6ec90b1e4d52eaa40915a64b1f86b6542f55","name":"https://github.com/langflow-ai/langflow/commit/fb3d6ec90b1e4d52eaa40915a64b1f86b6542f55","tags":["x_refsource_MISC"]},{"url":"https://github.com/langflow-ai/langflow/releases/tag/v1.10.1","name":"https://github.com/langflow-ai/langflow/releases/tag/v1.10.1","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.4,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-639","lang":"en","description":"CWE-639: Authorization Bypass Through User-Controlled Key","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-862","lang":"en","description":"CWE-862: Missing Authorization","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-10-05T20:20:27.287Z"},"source":{"advisory":"GHSA-gh98-4phw-6fmw","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/langflow-ai/langflow/security/advisories/GHSA-gh98-4phw-6fmw","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-06T13:58:15.330352Z","id":"CVE-2026-105698","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-06T13:58:36.614Z"}}]}}}