gcdRadar
archive/Patch now/AIR-2026-1283
closedclosed 13 Aug 2026Patch now2 Disclosed vulnerabilityAI

CVE-2026-73603: Chatflow visibility bypass in Flowise TTS endpoint

Flowise, OpenAI API, ElevenLabs API

Flowise before version 3.1.4 fails to validate chatflow visibility on its unauthenticated text-to-speech endpoint. Unauthenticated attackers can abuse stored OpenAI or ElevenLabs API keys to generate audio and incur costs.

disclosed CVENo confirmed exploitation, so this record is tracked as a disclosed vulnerability and not counted as an incident. It moves into the counts if CISA or the vendor confirms exploitation. Why

CVSS
6.3
EPSS
<0.01 · top 74% · 2026-11-13
EPSS scores by FIRST
fix status
Fix status unknown
first report
13 Aug 2026
last update
13 Aug 2026
CVE ids
CVE-2026-73603other records

Timeline · 1

  1. 13 Aug 2026CVE-2026-73603: Flowise before 3.1.4 fails to validate chatflow visibility in the unauthenticated text-to-speech endpoint, allowing attackers to…

Sources · 1

Advisories and databases

  1. 2026-08-13
    CVE-2026-73603: Flowise before 3.1.4 fails to validate chatflow visibility in the unauthenticated text-to-speech endpoint, allowing attackers to…
    NVD · nvd.nist.gov/vuln/detail/CVE-2026-73603

Titles and links belong to their publishers. The summary above is written by gcdRadar in its own words; data is CC BY-SA 4.0.

Classification

lane
Patch now
AI role
Attack on AI
categories
Infrastructure vulnerability
severity
2 · Disclosed vulnerability
fix status
Fix status unknown
targets
Framework / tooling, OpenAI
owasp llm top 10
LLM03:2025 Supply Chain
mitre atlas
no technique for these categories
tags
api-abuseaccess-control
dates
happened 13 Aug 2026 · first reported 13 Aug 2026
origin
NVD
Vulnerability record from NVD / the GitHub Advisory Database. This product uses the NVD API but is not endorsed or certified by the NVD.
record
confidence 0.95 · created 2026-10-18 10:04Z · updated 2026-10-18 10:04Z

Lane, AI role, categories and severity come from the classifier; the OWASP and ATLAS rows are derived from the categories. How these are assigned

Copy a brief

This record as a short Markdown brief, for a ticket, a chat or a coding agent.

the brief as text
# CVE-2026-73603: Chatflow visibility bypass in Flowise TTS endpoint

https://gcdradar.vercel.app/incidents/cve-2026-73603-chatflow-visibility-bypass-in-flowise-tts-end · AIR-2026-1283 · closed 2026-08-13

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2026-08-13
- AI role: Attack on AI
- Products: Flowise, OpenAI API, ElevenLabs API
- CVE ids: CVE-2026-73603
- CVSS: 6.3

## Summary

Flowise before version 3.1.4 fails to validate chatflow visibility on its unauthenticated text-to-speech endpoint. Unauthenticated attackers can abuse stored OpenAI or ElevenLabs API keys to generate audio and incur costs.

## What to do

No action recorded; read the sources below and the vendor's advisory.

## Latest updates

- 2026-08-13: CVE-2026-73603: Flowise before 3.1.4 fails to validate chatflow visibility in the unauthenticated text-to-speech endpoint, allowing attackers to… (https://nvd.nist.gov/vuln/detail/CVE-2026-73603)

## Sources

- 2026-08-13 NVD: CVE-2026-73603: Flowise before 3.1.4 fails to validate chatflow visibility in the unauthenticated text-to-speech endpoint, allowing attackers to… https://nvd.nist.gov/vuln/detail/CVE-2026-73603

Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.

Related

  1. closed9.9
    Flowise CVE-2026-67622: Flowise IDOR vulnerability in OpenAI Assistants integration

    Patch now · Disclosed · since 6 Aug 2026 · CVE-2026-67622

    AI
  2. closed7.1
    Flowise CVE-2026-70472: Flowise cross-workspace credential IDOR vulnerability

    Patch now · Disclosed · since 4 Aug 2026 · CVE-2026-70472

    AI
  3. closed7.5
    Flowise CVE-2026-90535: Flowise Denial of Service Vulnerability

    Patch now · Disclosed · since 12 Sep 2026 · CVE-2026-90535

    AI
  4. closed6.5
    Flowise CVE-2026-90533: Flowise broken access control vulnerability

    Patch now · Disclosed · since 12 Sep 2026 · CVE-2026-90533

    AI
  5. closed6.5
    Flowise CVE-2026-90534: Flowise credential resolution permission bypass

    Patch now · Disclosed · since 12 Sep 2026 · CVE-2026-90534

    AI
  6. closed9.8
    Flowise CVE-2026-52098: Flowise remote code execution vulnerability

    Patch now · Disclosed · since 10 Sep 2026 · CVE-2026-52098

    AI