{"action":"Upgrade langflow to 1.9.2 or later.","affected":[{"fixed":"1.9.2","introduced":"0"}],"component":"langflow","cve_ids":["CVE-2026-55255"],"ecosystem":"PyPI","epss":0.00887,"exploited":true,"fixed_versions":["1.9.2"],"ghsa_id":"GHSA-qrpv-q767-xqq2","id":"tcs_01M5KGY3FPRFM98TAZ6FN4AYTE","modified_at":"2026-06-26T00:00:06.061343789Z","published_at":"2026-06-23T17:17:08.050Z","references":["https://osv.dev/vulnerability/PYSEC-2026-221","https://github.com/langflow-ai/langflow/pull/12832","https://github.com/langflow-ai/langflow/security/advisories/GHSA-qrpv-q767-xqq2"],"severity":{"label":"critical","score":9.9},"sources":[{"source":"osv","source_id":"PYSEC-2026-221","url":"https://osv.dev/vulnerability/PYSEC-2026-221"},{"source":"kev","source_id":"CVE-2026-55255","url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json"}],"summary":"Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.9.2, an Insecure Direct Object Reference (IDOR) vulnerability in /api/v1/responses endpoint allows an authenti"}