CVE-2026-90535

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-xhxx-56g3-mx2r	Exploit Vendor Advisory
https://www.vulncheck.com/advisories/flowise-before-3.1.4-denial-of-service-via-text-to-speech-abort	Third Party Advisory
https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-xhxx-56g3-mx2r	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:flowiseai:flowise:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-09-12 13:16

Updated : 2026-09-15 19:07

NVD link : CVE-2026-90535

Mitre link : CVE-2026-90535

CVE.ORG link : CVE-2026-90535

JSON object : View

Products Affected

flowiseai

flowise

CWE

CWE-862

Missing Authorization

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