{"cve":{"cve_id":"CVE-2026-55446","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":null,"epss_percentile":null,"epss_as_of":null,"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.","published_at":"2026-06-23T16:26:17.990000Z","last_modified_at":null,"cvss_v3_score":7.5,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvss_v3_severity":"HIGH","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":["CWE-400"],"nvd_references":["https://github.com/langflow-ai/langflow/security/advisories/GHSA-qwqc-p3q8-wcg9","https://github.com/langflow-ai/langflow/pull/3923"],"vuln_status":null,"trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-28T17:55:37.240342Z","updated_at":"2026-06-28T23:30:55.940411Z"},"effective_severity":"HIGH","badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"N","value_label":"Network"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"U","value_label":"Unchanged"},{"metric":"C","name":"Confidentiality","value":"N","value_label":"None"},{"metric":"I","name":"Integrity","value":"N","value_label":"None"},{"metric":"A","name":"Availability","value":"H","value_label":"High"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"langflow-ai","vendor_name":"langflow-ai","product_slug":"langflow","product_name":"langflow","version_start":"< 1.0.19","version_start_inclusive":true,"version_end":"< 1.0.19","version_end_inclusive":true,"cpe23_uri":"cve5:langflow-ai:langflow:< 1.0.19:< 1.0.19"}],"exploit_refs":[],"news":[],"references":[{"url":"https://github.com/langflow-ai/langflow/security/advisories/GHSA-qwqc-p3q8-wcg9","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://github.com/langflow-ai/langflow/pull/3923","source_type":"PATCH","tags":["patch"]}],"timeline":[{"type":"published","at":"2026-06-23T16:26:17.990000Z","label":"CVE published","source":null}]}