SEPTEMBER 13, 2026
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Case File

CVE-2026-90535

MEDIUM · CVSS 6.3 EPSS 0.25% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-09-12 · Last synced 2026-09-13

CyberRota Analysis

AI-Generated

Flowise versions prior to 3.1.4 are vulnerable to an unauthenticated denial of service attack through the /api/v1/text-to-speech/abort endpoint, which lacks proper ownership verification for user-supplied chatflowId and chatId. This allows attackers to disrupt active chatflow predictions for any user by sending crafted requests, leading to service interruptions. Organizations using affected versions should prioritize patching to mitigate the risk of service disruption.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

GitHub PoC Links

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-90535
Severity
MEDIUM
CVSS
6.3
EPSS
0.25%

Original NVD 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.