CVE-2026-91935

HIGHCVSS 8.3

Description

Flowise before 3.1.4 fails to validate baseURL parameters in chat-model nodes, allowing authenticated users to redirect requests to arbitrary hosts. Attackers with chatflows:create or chatflows:update permissions can exfiltrate LLM provider API keys by redirecting requests to cloud metadata services or internal hosts.

Timeline

Published:September 15th, 2026 4:17 PM

Last modified:September 16th, 2026 8:15 PM

CVSS Scoring

CVSS v3: 8.3 (HIGH)

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

Weaknesses (CWE)

CWE-918

References & Reports

Advisories, patches, and third-party reports

https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-hx55-h48h-7rw9
https://www.vulncheck.com/advisories/flowise-before-3.1.4-ssrf-and-api-key-exfiltration-via-chat-model-nodes

Source: NIST NVD · Data may lag official sources by up to one minute