CVE-2025-59434 Critical Multi-Tenant Variable Disclosure in Flowise Cloud via Custom JavaScript Function
Authenticated users on the free tier can access sensitive environment variables and secrets from other tenants via a custom JavaScript function.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-59434?
CVE-2025-59434 is a critical vulnerability in FlowiseAI Flowise, published on 22 Sep 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Flowise is a drag & drop user interface to build a customized large language model flow. Prior to August 2025 Cloud-Hosted Flowise, an authenticated vulnerability in Flowise Cloud allows any user on the free tier to access sensitive environment variables from other tenants via the Custom JavaScript Function node. This includes secrets such as OpenAI API keys, AWS credentials, Supabase tokens, and Google Cloud secrets — resulting in a full cross-tenant data exposure. This issue has been patched in the August 2025 Cloud-Hosted Flowise.
Which versions are affected by CVE-2025-59434?
How do I fix CVE-2025-59434?
No fix has been published for CVE-2025-59434 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-59434 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-59434 exists.