CVE-2026-73486 Flowise before 3.1.3 Code Injection via CSV Agent customReadCSV
Authenticated attackers can execute arbitrary Python code in Flowise by bypassing regex validation in the CSV Agent node.
- 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-2026-73486?
CVE-2026-73486 is a critical code injection 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 before 3.1.3 contains a code injection vulnerability in the CSV Agent node's customReadCSV parameter that allows authenticated attackers to execute arbitrary Python code. The validator uses a static regex blocklist that can be bypassed through obfuscation techniques, enabling attackers to execute code in the unsandboxed pyodide environment with full system access.
Weakness: CWE-94
Which versions are affected by CVE-2026-73486?
It affects 1 product.
Products include Flowiseai Flowise.
How do I fix CVE-2026-73486?
No fix has been published for CVE-2026-73486 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-73486 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-73486 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
- CVE-2026-40933 Flowise: Authenticated RCE Via MCP Adapters
- CVE-2025-61913 Flowise is vulnerable to arbitrary file read, arbitrary file write
- CVE-2025-59528 Flowise has Remote Code Execution vulnerability
- CVE-2026-52098 Code injection in n/a
Sources
Also known as GHSA-4878-cqgq-j53v, GHSA-xcrh-wphv-74q4.