{"cve":{"cve_id":"CVE-2026-56277","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":0.00179,"epss_percentile":0.07487,"epss_as_of":"2026-08-26","description":"Flowise before 3.1.2 sets Access-Control-Allow-Origin to a hardcoded wildcard (*) on its text-to-speech (TTS) generation endpoint (packages/server/src/controllers/text-to-speech/index.ts), independent of the server's configured CORS policy. This bypasses the server's otherwise restrictive default CORS configuration (getCorsOptions()) and allows any webpage to make cross-origin requests that trigger TTS generation using stored credentials, enabling drive-by cross-origin credential abuse.","published_at":"2026-06-30T22:08:27.269000Z","last_modified_at":"2026-07-06T15:49:06.113000Z","cvss_v3_score":6.5,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","cvss_v3_severity":"MEDIUM","cvss_v4_score":6.9,"cvss_v4_vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","cvss_v4_severity":"MEDIUM","ssvc_decision":null,"ssvc_exploitation":"none","ssvc_automatable":true,"ssvc_technical_impact":"partial","cwes":["CWE-346"],"nvd_references":["https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-m837-xvxr-vqwg","https://www.vulncheck.com/advisories/flowise-hardcoded-cors-wildcard-in-tts-endpoint"],"vuln_status":"Analyzed","trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-30T22:43:50.441984Z","updated_at":"2026-07-07T03:25:56.716447Z"},"effective_severity":"MEDIUM","badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"N","value_label":"Network"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"U","value_label":"Unchanged"},{"metric":"C","name":"Confidentiality","value":"L","value_label":"Low"},{"metric":"I","name":"Integrity","value":"L","value_label":"Low"},{"metric":"A","name":"Availability","value":"N","value_label":"None"}]},"cvss_v4_decoded":{"version":"4.0","metrics":[{"metric":"AV","name":"Attack Vector","value":"N","value_label":"Network"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"AT","name":"Attack Requirements","value":"N","value_label":"None"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"VC","name":"Confidentiality (Vulnerable System)","value":"L","value_label":"Low"},{"metric":"VI","name":"Integrity (Vulnerable System)","value":"L","value_label":"Low"},{"metric":"VA","name":"Availability (Vulnerable System)","value":"N","value_label":"None"},{"metric":"SC","name":"Confidentiality (Subsequent System)","value":"N","value_label":"None"},{"metric":"SI","name":"Integrity (Subsequent System)","value":"N","value_label":"None"},{"metric":"SA","name":"Availability (Subsequent System)","value":"N","value_label":"None"}]},"affected":[{"vendor_slug":"flowise","vendor_name":"Flowise","product_slug":"flowise","product_name":"Flowise","version_start":"0","version_start_inclusive":true,"version_end":"3.1.2","version_end_inclusive":false,"cpe23_uri":"cve5:flowise:flowise:0:3.1.2"},{"vendor_slug":"flowise","vendor_name":"Flowise","product_slug":"flowise","product_name":"Flowise","version_start":"3.1.2","version_start_inclusive":true,"version_end":"3.1.2","version_end_inclusive":true,"cpe23_uri":"cve5:flowise:flowise:3.1.2:3.1.2"},{"vendor_slug":"flowiseai","vendor_name":"flowiseai","product_slug":"flowise","product_name":"flowise","version_start":null,"version_start_inclusive":null,"version_end":"3.1.2","version_end_inclusive":false,"cpe23_uri":"cpe:2.3:a:flowiseai:flowise:*:*:*:*:*:*:*:*"}],"exploit_refs":[],"news":[],"references":[{"url":"https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-m837-xvxr-vqwg","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://www.vulncheck.com/advisories/flowise-hardcoded-cors-wildcard-in-tts-endpoint","source_type":"VENDOR_ADVISORY","tags":["advisory"]}],"timeline":[{"type":"published","at":"2026-06-30T22:08:27.269000Z","label":"CVE published","source":null},{"type":"ssvc_changed","at":"2026-07-01T14:23:34.989359Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-07-01T14:23:34.989359Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-07-01T14:23:34.989359Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"cvss_changed","at":"2026-07-07T03:25:56.716447Z","label":"CVSS score revised","source":"nvd"},{"type":"cvss_changed","at":"2026-07-07T03:25:56.716447Z","label":"CVSS score revised","source":"nvd"},{"type":"cvss_changed","at":"2026-07-07T03:25:56.716447Z","label":"CVSS score revised","source":"nvd"}]}