{"cve_id":"CVE-2025-34291","published":"2025-12-05T23:15:47.433000+00:00","last_modified":"2026-10-15T21:10:00.327000+00:00","vuln_status":"Analyzed","description":"Langflow versions up to and including 1.6.9 contain a chained vulnerability that enables account takeover and remote code execution. An overly permissive CORS configuration (allow_origins='*' with allow_credentials=True) combined with a refresh token cookie configured as SameSite=None allows a malicious webpage to perform cross-origin requests that include credentials and successfully call the refresh endpoint. An attacker-controlled origin can therefore obtain fresh access_token / refresh_token pairs for a victim session. Obtained tokens permit access to authenticated endpoints — including built-in code-execution functionality — allowing the attacker to execute arbitrary code and achieve full system compromise.","cvss_version":"3.1","cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","base_score":8.8,"base_severity":"HIGH","attack_vector":"NETWORK","privileges_req":"LOW","user_interaction":"NONE","scope":"UNCHANGED","impact_c":"HIGH","impact_i":"HIGH","impact_a":"HIGH","cwe_ids":["CWE-346"],"in_kev":true,"kev_date_added":"2026-05-21","kev_ransomware":false,"epss_score":0.92808,"epss_percentile":0.99829,"cap_rule_version":"0.1.1","stage":"EXECUTION","req_access":"USER","req_vector":"NETWORK","req_user_interaction":false,"grant_access":"USER","caps":["CODE_EXEC"],"terminal":false,"cap_confidence":"high","ingested_at":"2026-10-28T03:24:50.302798+00:00","first_seen":"2025-12-05T23:15:47.433000+00:00","kev_first_seen":"2026-05-21T00:00:00+00:00","novelty_score":0.0,"novelty_reasons":[],"novelty_at":null,"vendors":["langflow"],"products":["langflow"],"affected":[{"vendor":"langflow","product":"langflow","ranges":["≤ 1.6.9"]}]}