{"id":"CVE-2026-41279","aliases":["EUVD-2026-25298","GHSA-5fw2-mwhh-9947"],"status":"published","title":"Flowise: Unauthenticated TTS endpoint accepts arbitrary credential IDs — enables API credit abuse via stored credentials","description":"Flowise is a drag \u0026 drop user interface to build a customized large language model flow. Prior to 3.1.0, the text-to-speech generation endpoint (POST /api/v1/text-to-speech/generate) is whitelisted (no auth) and accepts a credentialId directly in the request body. When called without a chatflowId, the endpoint uses the provided credentialId to decrypt the stored credential (e.g., OpenAI or ElevenLabs API key) and generate speech. This vulnerability is fixed in 3.1.0.","severity":{"version":"4.0","score":8.2,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00261,"percentile":0.17973,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-639"],"published":"2026-04-17T21:35:14Z","modified":"2026-10-28T02:30:26Z","fixes":[{"ecosystem":"npm","package":"flowise","fixed_in":["3.1.0"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"flowise","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"3.0.13"},{"fixed":"3.1.0"}]}]},{"source":"osv","ecosystem":"npm","package":"flowise","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.1.0"}]}]}],"products":[{"vendor":"flowiseai","product":"flowise"}],"references":[{"url":"https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-5fw2-mwhh-9947","tags":["x_refsource_CONFIRM","Exploit","Vendor Advisory","advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-41279","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-5fw2-mwhh-9947"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/41xxx/CVE-2026-41279.json","tags":["advisory"]},{"url":"https://github.com/FlowiseAI/Flowise","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-41279","title":"Flowise: Unauthenticated TTS endpoint accepts arbitrary credential IDs — enables API credit abuse via stored credentials","description":"Flowise is a drag \u0026 drop user interface to build a customized large language model flow. Prior to 3.1.0, the text-to-speech generation endpoint (POST /api/v1/text-to-speech/generate) is whitelisted (no auth) and accepts a credentialId directly in the request body. When called without a chatflowId, the endpoint uses the provided credentialId to decrypt the stored credential (e.g., OpenAI or ElevenLabs API key) and generate speech. This vulnerability is fixed in 3.1.0.","status":"published","published":"2026-04-23T19:53:15.237Z","modified":"2026-04-23T20:18:05.355Z","cvss":[{"version":"4.0","score":8.2,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna"}],"cwes":["CWE-639"],"updated_at":"2026-11-02T13:41:19.694734Z"}],"euvd":[{"id":"EUVD-2026-25298","description":"Flowise is a drag \u0026 drop user interface to build a customized large language model flow. Prior to 3.1.0, the text-to-speech generation endpoint (POST /api/v1/text-to-speech/generate) is whitelisted (no auth) and accepts a credentialId directly in the request body. When called without a chatflowId, the endpoint uses the provided credentialId to decrypt the stored credential (e.g., OpenAI or ElevenLabs API key) and generate speech. This vulnerability is fixed in 3.1.0.","status":"published","published":"2026-04-23T19:53:15Z","modified":"2026-04-23T20:18:05Z","cvss":[{"version":"4.0","score":8.2,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T19:24:18.636842Z"}],"ghsa":[{"id":"GHSA-5fw2-mwhh-9947","title":"Flowise: Unauthenticated TTS endpoint accepts arbitrary credential IDs — enables API credit abuse via stored credentials","description":"### Summary\n\nThe text-to-speech generation endpoint (`POST /api/v1/text-to-speech/generate`) is whitelisted (no auth) and accepts a `credentialId` directly in the request body. When called without a `chatflowId`, the endpoint uses the provided `credentialId` to decrypt the stored credential (e.g., OpenAI or ElevenLabs API key) and generate speech.\n\n### Root Cause\n\n```typescript\n// packages/server/src/controllers/text-to-speech/index.ts:58-64\n} else {\n    // Use TTS config from request body\n    provider = bodyProvider\n    credentialId = bodyCredentialId  // ← attacker-controlled credential ID\n    voice = bodyVoice\n    model = bodyModel\n}\n```\n\n### Docker Validation\n\n`POST /api/v1/text-to-speech/generate` with arbitrary `credentialId` in body: endpoint processes request, sends SSE `tts_start` event, only fails when credential doesn't exist — proves code path runs without authentication.\n\n### Impact\n\n- Use victim's API keys (OpenAI, ElevenLabs, Azure, Google) without authorization\n- Burn API credits on the victim's account\n- Generate unlimited speech content at victim's expense\n- Combined with credential ID leak from Finding 2, this is trivially exploitable\n\n### Suggested Fix\n\nRemove the TTS endpoint from `WHITELIST_URLS` or validate that the credential belongs to the chatflow being used:\n\n```typescript\n// Only allow credentialId when it matches the chatflow's TTS configuration\nif (!chatflowId) {\n    return res.status(401).json({ message: 'Authentication required' })\n}\n```\n\n---\n\n## References\n\n- `packages/server/src/controllers/text-to-speech/index.ts` lines 10-162\n- `packages/server/src/utils/constants.ts` line 41 (whitelist entry)\n\n## Credits\n- Shinobi Security - https://github.com/shinobisecurity","status":"published","published":"2026-04-17T21:35:14Z","modified":"2026-04-24T21:00:53Z","cvss":[{"version":"4.0","score":8.2,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-639"],"updated_at":"2026-11-02T14:39:57.650091Z"}],"nvd":[{"id":"CVE-2026-41279","description":"Flowise is a drag \u0026 drop user interface to build a customized large language model flow. Prior to 3.1.0, the text-to-speech generation endpoint (POST /api/v1/text-to-speech/generate) is whitelisted (no auth) and accepts a credentialId directly in the request body. When called without a chatflowId, the endpoint uses the provided credentialId to decrypt the stored credential (e.g., OpenAI or ElevenLabs API key) and generate speech. This vulnerability is fixed in 3.1.0.","status":"published","published":"2026-04-23T20:16:16.687Z","modified":"2026-10-26T21:10:00.17Z","cvss":[{"version":"4.0","score":8.2,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"}],"cwes":["CWE-639"],"updated_at":"2026-11-02T14:12:15.867234Z"}],"osv":[{"id":"CVE-2026-41279","title":"Flowise: Unauthenticated TTS endpoint accepts arbitrary credential IDs — enables API credit abuse via stored credentials","description":"Flowise is a drag \u0026 drop user interface to build a customized large language model flow. Prior to 3.1.0, the text-to-speech generation endpoint (POST /api/v1/text-to-speech/generate) is whitelisted (no auth) and accepts a credentialId directly in the request body. When called without a chatflowId, the endpoint uses the provided credentialId to decrypt the stored credential (e.g., OpenAI or ElevenLabs API key) and generate speech. This vulnerability is fixed in 3.1.0.","status":"published","published":"2026-04-23T19:53:15.237Z","modified":"2026-10-28T02:30:26.154200563Z","cvss":[{"version":"4.0","score":8.2,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-639"],"updated_at":"2026-11-02T15:45:03.764807Z"},{"id":"GHSA-5fw2-mwhh-9947","title":"Flowise: Unauthenticated TTS endpoint accepts arbitrary credential IDs — enables API credit abuse via stored credentials","description":"### Summary\n\nThe text-to-speech generation endpoint (`POST /api/v1/text-to-speech/generate`) is whitelisted (no auth) and accepts a `credentialId` directly in the request body. When called without a `chatflowId`, the endpoint uses the provided `credentialId` to decrypt the stored credential (e.g., OpenAI or ElevenLabs API key) and generate speech.\n\n### Root Cause\n\n```typescript\n// packages/server/src/controllers/text-to-speech/index.ts:58-64\n} else {\n    // Use TTS config from request body\n    provider = bodyProvider\n    credentialId = bodyCredentialId  // ← attacker-controlled credential ID\n    voice = bodyVoice\n    model = bodyModel\n}\n```\n\n### Docker Validation\n\n`POST /api/v1/text-to-speech/generate` with arbitrary `credentialId` in body: endpoint processes request, sends SSE `tts_start` event, only fails when credential doesn't exist — proves code path runs without authentication.\n\n### Impact\n\n- Use victim's API keys (OpenAI, ElevenLabs, Azure, Google) without authorization\n- Burn API credits on the victim's account\n- Generate unlimited speech content at victim's expense\n- Combined with credential ID leak from Finding 2, this is trivially exploitable\n\n### Suggested Fix\n\nRemove the TTS endpoint from `WHITELIST_URLS` or validate that the credential belongs to the chatflow being used:\n\n```typescript\n// Only allow credentialId when it matches the chatflow's TTS configuration\nif (!chatflowId) {\n    return res.status(401).json({ message: 'Authentication required' })\n}\n```\n\n---\n\n## References\n\n- `packages/server/src/controllers/text-to-speech/index.ts` lines 10-162\n- `packages/server/src/utils/constants.ts` line 41 (whitelist entry)\n\n## Credits\n- Shinobi Security - https://github.com/shinobisecurity","status":"published","published":"2026-04-17T21:35:14Z","modified":"2026-05-05T16:11:36.269276Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"},{"version":"4.0","score":8.2,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-639"],"updated_at":"2026-11-02T15:46:38.213481Z"}]}}