{"cve":"CVE-2026-21445","nvd":{"published":"2026-01-02T20:16:17.880","modified":"2026-06-17T10:18:41.100","status":"Analyzed","description":"Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to version 1.7.0.dev45, multiple critical API endpoints in Langflow are missing authentication controls. The issue allows any unauthenticated user to access sensitive user conversation data, transaction histories, and perform destructive operations including message deletion. This affects endpoints handling personal data and system operations that should require proper authorization. Version 1.7.0.dev45 contains a patch.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:P","score":8.8},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","score":9.1},"cwes":["CWE-306"],"references":["https://github.com/langflow-ai/langflow/commit/3fed9fe1b5658f2c8656dbd73508e113a96e486a","https://github.com/langflow-ai/langflow/security/advisories/GHSA-c5cp-vx83-jhqx"],"products":["langflow:langflow"],"source":"nvd","synced_at":"2026-10-19T22:19:41.481987139+00:00"},"epss":{"cve":"CVE-2026-21445","score":0.33289,"percentile":0.98371,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-c5cp-vx83-jhqx","url":"https://osv.dev/vulnerability/GHSA-c5cp-vx83-jhqx","summary":"Langflow Missing Authentication on Critical API Endpoints","modified":"2026-07-13T16:43:12.878765695Z","packages":[{"ecosystem":"PyPI","name":"langflow-base","purl":"pkg:pypi/langflow-base","ranges":["<0.7.1"],"fixed":["0.7.1"]},{"ecosystem":"PyPI","name":"langflow","purl":"pkg:pypi/langflow","ranges":["<1.7.1"],"fixed":["1.7.1"]}]},{"id":"PYSEC-2026-1524","url":"https://osv.dev/vulnerability/PYSEC-2026-1524","summary":"Langflow Missing Authentication on Critical API Endpoints","modified":"2026-07-13T16:43:12.878765695Z","packages":[{"ecosystem":"PyPI","name":"langflow","purl":"pkg:pypi/langflow","ranges":["<1.7.1"],"fixed":["1.7.1"]}]},{"id":"PYSEC-2026-2571","url":"https://osv.dev/vulnerability/PYSEC-2026-2571","summary":"Langflow Missing Authentication on Critical API Endpoints","modified":"2026-07-13T16:43:12.878765695Z","packages":[{"ecosystem":"PyPI","name":"langflow-base","purl":"pkg:pypi/langflow-base","ranges":["<0.7.1"],"fixed":["0.7.1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}