{"action":"Upgrade langflow to 1.9.1 or later.","affected":[{"fixed":"1.9.1","introduced":"0"}],"component":"langflow","cve_ids":["CVE-2026-55255"],"ecosystem":"PyPI","epss":0.00887,"exploited":true,"fixed_versions":["1.9.1"],"ghsa_id":"GHSA-qrpv-q767-xqq2","id":"tcs_01M5KFWMJD9YEJ4YBKBYYGWP5T","modified_at":"2026-07-07T22:30:08.905598564Z","published_at":"2026-06-19T21:16:46Z","references":["https://osv.dev/vulnerability/GHSA-qrpv-q767-xqq2","https://github.com/langflow-ai/langflow/security/advisories/GHSA-qrpv-q767-xqq2","https://nvd.nist.gov/vuln/detail/CVE-2026-55255","https://github.com/langflow-ai/langflow/pull/12832","https://github.com/langflow-ai/langflow/commit/2c9f498d664a3c32698b57d7c5e752625291060e","https://github.com/langflow-ai/langflow","https://github.com/pypa/advisory-database/tree/main/vulns/langflow/PYSEC-2026-221.yaml","https://webflow.sysdig.com/blog/understanding-langflow-cve-2026-55255-and-why-higher-cvss-vulnerabilities-arent-always-the-most-exploited","https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-55255"],"severity":{"label":"high","score":8.4},"sources":[{"source":"osv","source_id":"GHSA-qrpv-q767-xqq2","url":"https://osv.dev/vulnerability/GHSA-qrpv-q767-xqq2"},{"source":"kev","source_id":"CVE-2026-55255","url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json"}],"summary":"Langflow: IDOR Vulnerability in `/api/v1/responses` Endpoint Allows Authenticated Attackers to Access Another User's Flow"}