CVE-2026-73603

unknowncovered by 1 sourcefirst seen 2026-08-13

Flowise before 3.1.4 fails to validate chatflow visibility in the unauthenticated text-to-speech endpoint, allowing attackers to abuse private chatflow TTS credentials. Unauthenticated attackers can generate unlimited text-to-speech audio using stored OpenAI or ElevenLabs API keys by providing a valid chatflow UUID, incurring costs on the chatflow owner's account.

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Exploitation outlook

Low exploitation risk0.32% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 24% of all EPSS-scored CVEs.

Advisory coverage (1)

unknownCVE-2026-73603: Flowise before 3.1.4 fails to validate chatflow visibility in the unauthenticated text-to-spee…nvd · 2026-08-13

External references

NVD record for CVE-2026-73603

CVE.org record

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