{"data":{"id":"bc15ff43-c7de-4ada-a9bc-644a250bd0da","title":"GHSA-m837-xvxr-vqwg: Flowise: Hardcoded CORS wildcard on TTS endpoint enables cross-origin credential abuse from any webpage","summary":"Flowise's TTS generation endpoint hardcodes `Access-Control-Allow-Origin: *` in packages/server/src/controllers/text-to-speech/index.ts (line 83), independent of the server's CORS configuration. This lets any webpage make cross-origin requests that generate speech using stored credentials, bypassing the restrictive default `getCorsOptions()` policy. Combined with Finding 3 (TTS credential abuse), it enables drive-by credential abuse via malicious webpages.","solution":"Remove the hardcoded CORS wildcard and let the server's CORS middleware handle the headers. Delete the lines `res.setHeader('Access-Control-Allow-Origin', '*')` and `res.setHeader('Access-Control-Allow-Headers', 'Cache-Control')`.","labels":["security"],"sourceUrl":"https://github.com/advisories/GHSA-m837-xvxr-vqwg","publishedAt":"2026-05-20T15:38:02.000Z","cveId":null,"cweIds":null,"cvssScore":null,"cvssSeverity":"medium","severity":"medium","attackType":["other"],"issueType":"vulnerability","affectedPackages":["flowise@<= 3.1.1 (fixed: 3.1.2)"],"affectedPackageNames":["flowise"],"affectedPackageRefs":["npm:flowise"],"affectedVendors":[],"affectedVendorsRaw":["Flowise"],"classifierModel":"claude-haiku-5-5","classifierPromptVersion":"v4","summaryPromptVersion":"v2","headline":null,"headlinePromptVersion":null,"cvssVector":null,"attackVector":null,"attackComplexity":null,"privilegesRequired":null,"userInteraction":null,"exploitMaturity":null,"epssScore":null,"epssCheckedAt":null,"kevDateAdded":null,"advisoryAliases":["GHSA-m837-xvxr-vqwg"],"affectedPackagesSource":null,"affectedPackagesCheckedAt":null,"patchAvailable":true,"disclosureDate":"2026-05-20T15:38:02.000Z","capecIds":null,"crossRefCount":0,"attackSophistication":"moderate","impactType":["confidentiality","integrity"],"aiComponentTargeted":"api","llmSpecific":false,"classifierConfidence":0.85,"researchCategory":null,"atlasIds":null}}