High severity · published Jun 23, 2026
CVE-2026-56275
Flowise - Server-Side Request Forgery via Execute Flow Base URL
7.1
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 24% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FL
Flowise · Flowise
before 3.1.0; before 3.1.0 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-56275
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-56275
Exploit
https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-9hrv-gvrv-6gf2
Third Party Advisory
https://www.vulncheck.com/advisories/flowise-server-side-request-forgery-via-execute-flow-base-url
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