FlowCI flow-core-x <=1.23.01: SSRF via SMTP Host Handler
CVE-2026-4215 Published on March 16, 2026

FlowCI flow-core-x SMTP Host ConfigServiceImpl.java save server-side request forgery
A security flaw has been discovered in FlowCI flow-core-x up to 1.23.01. The impacted element is the function Save of the file core/src/main/java/com/flowci/core/config/service/ConfigServiceImpl.java of the component SMTP Host Handler. The manipulation results in server-side request forgery. The attack may be performed from remote. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

NVD

Timeline

Advisory disclosed

VulDB entry created

VulDB entry last update

Weakness Type

What is a SSRF Vulnerability?

The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. By providing URLs to unexpected hosts or ports, attackers can make it appear that the server is sending the request, possibly bypassing access controls such as firewalls that prevent the attackers from accessing the URLs directly. The server can be used as a proxy to conduct port scanning of hosts in internal networks, use other URLs such as that can access documents on the system (using file://), or use other protocols such as gopher:// or tftp://, which may provide greater control over the contents of requests.

CVE-2026-4215 has been classified to as a SSRF vulnerability or weakness.


Affected Versions

FlowCI flow-core-x Version 1.23.01 is affected by CVE-2026-4215

Exploit Probability

EPSS
0.04%
Percentile
11.17%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.