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CVE-2026-90535

7.5, high

FlowiseAI Flowise Missing Authorization Vulnerability

NVD (opens in a new tab) CVE.org (opens in a new tab)
CVSS
7.5, high high CVSS v3.1
EPSS, next 30 days
0.5% higher than 40.1% of scored CVEs
Exploitation
Exploit code published
Published
12 Sept 2026a month ago

Description

Flowise versions before 3.1.4 contain an unauthenticated denial of service vulnerability in the /api/v1/text-to-speech/abort endpoint that accepts user-supplied chatflowId and chatId without ownership verification. Attackers can terminate active chatflow predictions for any user by submitting requests with known chatflow and chat identifiers, causing targeted service disruption.

Details

Vendor
FlowiseAI
Product
Flowise
Weakness
CWE-862 (opens in a new tab)
Status
Analyzed
Updated
15 Sept 2026
Assigner
disclosure@vulncheck.com

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References 2

Exploit code 1

Advisories 1

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other FlowiseAI CVEs

Every FlowiseAI CVE we hold

Same vendor in what we hold, not a known link between the flaws.

  • CVE-2026-91929 FlowiseAI Flowise Missing Authorization Vulnerability EPSS 0.4% 7.1, high
  • CVE-2026-91934 FlowiseAI Flowise Path Traversal Vulnerability EPSS 0.7% 8.8, high

Beyond this page

Is CVE-2026-90535 in your network?

This page tells you how dangerous CVE-2026-90535 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

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Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 18 Oct 2026, not the live upstream state.