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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| SUSE | fleet | 0.9.0-rc.1 – < 0.10.12, 0.11.0 – < 0.11.7, 0.12.0 – < 0.12.2 | 0.10.12 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | govulncheck-vulndb | 0.0.20250506T153719-1.1 | openSUSE-SU-2025:15059-1 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| 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 | GHSA-xgpc-q899-67p8 |
| 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 | GO-2025-3649 |
Advisories 1
- openSUSE-SU-2025:15059-1 govulncheck-vulndb-0.0.20250506T153719-1.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026