{"id":"CVE-2026-56277","state":"PUBLISHED","title":"Flowise - Hardcoded CORS Wildcard in TTS Endpoint","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.","publishedAt":"2026-06-30T22:08:27.269Z","updatedAt":"2026-07-01T13:10:16.435Z","severity":{"score":6.9,"label":"Medium","version":"4.0","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","source":"VulnCheck"},"assigner":"VulnCheck","products":["Flowise Flowise"],"affected":[{"vendor":"Flowise","product":"Flowise","packageURL":"pkg:npm/flowise","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"3.1.2","versionType":"semver"},{"version":"3.1.2","status":"unaffected","versionType":"semver"}]}],"references":["https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-m837-xvxr-vqwg","https://www.vulncheck.com/advisories/flowise-hardcoded-cors-wildcard-in-tts-endpoint"],"weaknesses":["CWE-346"],"ingestedAt":"2026-10-29T20:12:24.861Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/56xxx/CVE-2026-56277.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-56277","state":"PUBLISHED","datePublished":"2026-06-30T22:08:27.269Z","dateUpdated":"2026-07-01T13:10:16.435Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-06-20T01:51:24.918Z"},"containers":{"cna":{"title":"Flowise - Hardcoded CORS Wildcard in TTS Endpoint","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"Flowise","product":"Flowise","packageURL":"pkg:npm/flowise","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"3.1.2","versionType":"semver"},{"version":"3.1.2","status":"unaffected","versionType":"semver"}]}],"references":[{"url":"https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-m837-xvxr-vqwg","name":"GitHub Security Advisory (GHSA-m837-xvxr-vqwg)","tags":["vendor-advisory"]},{"url":"https://www.vulncheck.com/advisories/flowise-hardcoded-cors-wildcard-in-tts-endpoint","name":"VulnCheck Advisory: Flowise - Hardcoded CORS Wildcard in TTS Endpoint","tags":["third-party-advisory"]}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"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","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"LOW","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":6.9,"baseSeverity":"MEDIUM"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-346","lang":"en","description":"Origin Validation Error","type":"CWE"}]}],"providerMetadata":{"shortName":"VulnCheck","orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateUpdated":"2026-06-30T22:08:27.269Z"},"datePublic":"2026-05-14T00:00:00.000Z","cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:flowiseai:flowise:*:*:*:*:*:*:*:*","versionEndExcluding":"3.1.2"}]}]}],"credits":[{"lang":"en","value":"DeathsPirate","type":"reporter"}],"x_generator":{"engine":"vulncheck-endgame"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-01T13:06:07.259705Z","id":"CVE-2026-56277","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-01T13:10:16.435Z"}}]}}}