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 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.
- CVSS 3.1
- 6.3
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L - EPSS
- 0.2% chance of exploitation in the next 30 days; higher than 8% of CVEs (scores of 2026-10-25)
- CWE
- CWE-295
- Published
- Modified
- Record from
- the NVD, synced
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-xgpc-q899-67p8 | Go | github.com/rancher/fleet | >=0.9.0-rc.1 <0.10.12 | 0.10.12 |
| GHSA-xgpc-q899-67p8 | Go | github.com/rancher/fleet | >=0.11.0 <0.11.7 | 0.11.7 |
| GHSA-xgpc-q899-67p8 | Go | github.com/rancher/fleet | >=0.12.0 <0.12.2 | 0.12.2 |
| GO-2025-3649 | Go | github.com/rancher/fleet | >=0.9.0-rc.1 <0.10.12 >=0.11.0 <0.11.7 >=0.12.0 <0.12.2 | 0.10.12, 0.11.7, 0.12.2 |