CVE-2025-23390: A vulnerability has been identified within Fleet where, by default, Fleet will automatically trust a remote server’s certificate when connecting through SSH if…

PriorityP340medium6.3CVSS 3.1

AVNACLPRLUINSUCLILAL

EPSS

0.19%

8.2th percentile

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.

Affected

6 ranges

Vendor	Product	Version range	Fixed in
github.com	rancher_fleet	>= 0.11.0 < 0.11.7	0.11.7
github.com	rancher_fleet	>= 0.12.0 < 0.12.2	0.12.2
github.com	rancher_fleet	>= 0.9.0-rc.1 < 0.10.12	0.10.12
suse	fleet	>= 0.11.0 < 0.11.7	0.11.7
suse	fleet	>= 0.12.0 < 0.12.2	0.12.2
suse	fleet	>= 0.9.0-rc.1 < 0.10.12	0.10.12

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