{"cve":"CVE-2026-55255","nvd":{"published":"2026-06-23T17:17:08.050","modified":"2026-10-25T23:10:00.167","status":"Analyzed","description":"Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.9.1, an Insecure Direct Object Reference (IDOR) vulnerability in /api/v1/responses endpoint allows an authenticated attacker to execute any flow belonging to another user by specifying the victim's flow ID in the request. This vulnerability is fixed in 1.9.1.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L","score":8.4},"cwes":["CWE-639"],"references":["https://github.com/langflow-ai/langflow/commit/2c9f498d664a3c32698b57d7c5e752625291060e","https://github.com/langflow-ai/langflow/pull/12832","https://github.com/langflow-ai/langflow/security/advisories/GHSA-qrpv-q767-xqq2","https://github.com/langflow-ai/langflow/security/advisories/GHSA-qrpv-q767-xqq2","https://webflow.sysdig.com/blog/understanding-langflow-cve-2026-55255-and-why-higher-cvss-vulnerabilities-arent-always-the-most-exploited"],"products":["langflow:langflow"],"source":"nvd","synced_at":"2026-10-25T23:44:33.281319194+00:00"},"epss":{"cve":"CVE-2026-55255","score":0.00887,"percentile":0.59018,"date":"2026-10-25"},"kev":{"cve":"CVE-2026-55255","date_added":"2026-07-07","due_date":"2026-07-10","vendor":"Langflow","product":"Langflow","known_ransomware":false},"osv":[{"id":"GHSA-qrpv-q767-xqq2","url":"https://osv.dev/vulnerability/GHSA-qrpv-q767-xqq2","summary":"Langflow: IDOR Vulnerability in `/api/v1/responses` Endpoint Allows Authenticated Attackers to Access Another User's Flow","modified":"2026-07-07T22:30:08.905598564Z","packages":[{"ecosystem":"PyPI","name":"langflow","purl":"pkg:pypi/langflow","ranges":["<1.9.1"],"fixed":["1.9.1"]}]},{"id":"PYSEC-2026-221","url":"https://osv.dev/vulnerability/PYSEC-2026-221","summary":"","modified":"2026-06-26T00:00:06.061343789Z","packages":[{"ecosystem":"PyPI","name":"langflow","purl":"pkg:pypi/langflow","ranges":["<1.9.2"],"fixed":["1.9.2"]}]}],"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."]}