CVE-2026-56275 Flowise - Server-Side Request Forgery via Execute Flow Base URL

What is CVE-2026-56275?

CVE-2026-56275 is a medium-severity server-side request forgery vulnerability in Flowiseai Flowise, published on 23 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Flowise before 3.1.0 contains a server-side request forgery vulnerability in the Execute Flow node that allows attackers to bypass security validation by providing intranet addresses through the base URL field. Attackers can initiate HTTP requests to internal network addresses, access cloud metadata, and enumerate internal services by exploiting the missing secureFetch verification in httpSecurity.ts.

Weakness: CWE-918

Which versions are affected by CVE-2026-56275?

4 open source packages ship an affected version, including flowise and flowise-components. It affects 1 product.

Products include Flowiseai Flowise.

How do I fix CVE-2026-56275?

Upgrade flowise to 3.1.0 or later.

Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.

Is CVE-2026-56275 being exploited?

There is no known exploitation of CVE-2026-56275 in the wild and no public exploit code.

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
• How this page is made

Also known as GHSA-9hrv-gvrv-6gf2.