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

What is CVE-2026-73488?

CVE-2026-73488 is a medium-severity missing authorization vulnerability in Flowiseai Flowise, published on 13 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official 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.

Weakness: CWE-639

Which versions are affected by CVE-2026-73488?

2 open source packages ship an affected version, including flowise. It affects 1 product.

Products include Flowiseai Flowise.

How do I fix CVE-2026-73488?

Upgrade flowise to 3.1.3 or later.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2026-73488 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-73488 exists.

Other vulnerabilities in Flowiseai Flowise

• CVE-2025-71338 Flowise through 2.2.7 - Arbitrary File Write to Remote Code Execution via document-store API Critical 10.0
• CVE-2026-40933 Flowise: Authenticated RCE Via MCP Adapters Critical 10.0
• CVE-2025-61913 Flowise is vulnerable to arbitrary file read, arbitrary file write Critical 10.0
• CVE-2025-59528 Flowise has Remote Code Execution vulnerability Critical 10.0
• CVE-2026-52098 Code injection in n/a Critical 9.8

All Flowiseai Flowise vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• GitHub advisory
• How this page is made

Also known as GHSA-2364-jh4q-m9vm, GHSA-p4mj-q6c6-6f68.