{"id":"CVE-2026-55446","state":"PUBLISHED","title":"Langflow: Unauthenticated DoS through multipart form boundary file upload","description":"Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.0.19, an attacker can send a /api/v1/files/upload/ request without any authentication token/cookies and abuse a very long multipart form boundary to make the langflow app unusable for all users for an indefinite amount of time. This vulnerability is fixed in 1.0.19.","publishedAt":"2026-06-23T16:26:17.990Z","updatedAt":"2026-06-23T17:56:37.766Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["langflow-ai langflow"],"affected":[{"vendor":"langflow-ai","product":"langflow","versions":[{"version":"< 1.0.19","status":"affected"}]}],"references":["https://github.com/langflow-ai/langflow/security/advisories/GHSA-qwqc-p3q8-wcg9","https://github.com/langflow-ai/langflow/pull/3923"],"weaknesses":["CWE-400"],"ingestedAt":"2026-10-29T20:12:24.861Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/55xxx/CVE-2026-55446.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-55446","state":"PUBLISHED","datePublished":"2026-06-23T16:26:17.990Z","dateUpdated":"2026-06-23T17:56:37.766Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-16T21:59:57.018Z"},"containers":{"cna":{"title":"Langflow: Unauthenticated DoS through multipart form boundary file upload","descriptions":[{"lang":"en","value":"Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.0.19, an attacker can send a /api/v1/files/upload/ request without any authentication token/cookies and abuse a very long multipart form boundary to make the langflow app unusable for all users for an indefinite amount of time. This vulnerability is fixed in 1.0.19."}],"affected":[{"vendor":"langflow-ai","product":"langflow","versions":[{"version":"< 1.0.19","status":"affected"}]}],"references":[{"url":"https://github.com/langflow-ai/langflow/security/advisories/GHSA-qwqc-p3q8-wcg9","name":"https://github.com/langflow-ai/langflow/security/advisories/GHSA-qwqc-p3q8-wcg9","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/langflow-ai/langflow/pull/3923","name":"https://github.com/langflow-ai/langflow/pull/3923","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-400","lang":"en","description":"CWE-400: Uncontrolled Resource Consumption","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-06-23T16:26:17.990Z"},"source":{"advisory":"GHSA-qwqc-p3q8-wcg9","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/langflow-ai/langflow/security/advisories/GHSA-qwqc-p3q8-wcg9","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-23T17:56:04.889802Z","id":"CVE-2026-55446","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-06-23T17:56:37.766Z"}}]}}}