What’s Vulnerable › Vulnerabilities

CVE-2026-73488: Flowise before 3.1.3 IDOR via customer-default-source endpoint

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-08-13 · updated 2026-10-24
• Weakness: CWE-639

Description

Flowise versions before 3.1.3 contain an insecure direct object reference vulnerability in the GET /api/v1/organization/customer-default-source endpoint that allows authenticated attackers to access other customers' payment and profile data by manipulating the customerId parameter. Attackers can enumerate predictable customer IDs to retrieve sensitive information including email addresses, account balances, currency types, and billing configurations without authorization checks.

Affected products

• FlowiseAI Flowise: before 3.1.3 — fixed in 3.1.3

How to fix

Upgrade to a fixed version: FlowiseAI Flowise 3.1.3. Check the vendor advisory for mitigations.

References

• https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-2364-jh4q-m9vm
• https://www.vulncheck.com/advisories/flowise-before-idor-via-customer-default-source-endpoint
• https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-2364-jh4q-m9vm

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