CVE-2025-23390

Published: Oct 15, 2026Modified: Oct 19, 2026

6.3

Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

Exploitability: 2.8 / Impact: 3.4

Source: meissner@suse.de (Secondary)

Description

A vulnerability has been identified within Fleet where, by default, Fleet will automatically trust a remote server’s certificate when connecting through SSH if the certificate isn’t set in the `known_hosts` file. This could allow the execution of a man-in-the-middle (MitM) attack against Fleet. In case the server that is being connected to has a trusted entry in the known_hosts file, then Fleet will correctly check the authenticity of the presented certificate.

Related CWEs

CWE-295

Improper Certificate Validation

The product does not validate, or incorrectly validates, a certificate.

References (2)

https://bugzilla.suse.com/show_bug.cgi?id=CVE-2025-23390

Source: meissner@suse.de

https://github.com/rancher/fleet/security/advisories/GHSA-xgpc-q899-67p8

Source: meissner@suse.de

Timeline

No history available yet.