Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-73603

CVE-2026-73603MEDIUM

FlowiseAI Flowise — Flowise before 3.1.4 Credential Abuse via Text-to-Speech

  AV  AC  AT  PR  UI  VC  VI  VA   CVSS    EPSS   %ile   KEV
   N   L   P   N   N   N   L   L    6.3   .0033   23.8     —

AFFECTED
  Product  Versions     Fixed
  Flowise  unspecified  3.1.4

TIMELINE
  Aug 13  Reserved by VulnCheck
  Aug 13  Published (CNA: VulnCheck)
  Sep 4   EXPLOIT PUBLISHED — CVE-2026-73603 (FlowiseAI Flowise). Public exploit reference added.

CWE-862 · CNA: VulnCheck · CVSS v4.0 · 2 references · NVD status: Analyzed

Description

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
August 13, 2026	Reserved	Reserved by VulnCheck
August 13, 2026	Published	Published (CNA: VulnCheck)
September 4, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-73603 (FlowiseAI Flowise). Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
FlowiseAI	Flowise	—	—	3.1.4

Weaknesses

CWE-862

References (2)

https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-8gj2-2cvc-6xx7 [Exploit, Mitigation, Vendor Advisory]
https://www.vulncheck.com/advisories/flowise-before-credential-abuse-via-text-to-speech [Third Party Advisory]

Authoritative record: CVE-2026-73603 at cve.org

Vendors: flowiseai

Weaknesses: CWE-862

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-73603 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.