What’s Vulnerable › Vulnerabilities
CVE-2026-75036: Fleet: DNS exfiltration via Sprig getHostByName in fleet.yaml Helm template preprocessing
- Severity: medium (CVSS 4.3 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-09-03 · updated 2026-10-07
- Weakness: CWE-918
Description
A security vulnerability was discovered in Fleet's Helm template preprocessing where templates evaluated by the Fleet controller could reach network resources outside the management cluster. A user who can supply bundle content to a repository referenced by a `GitRepo` resource can cause the Fleet controller to: - Disclose cluster metadata available to the templating context. - Reveal information about hosts reachable from the controller's network position. Because the disclosure channel is name resolution, it may remain effective in environments where outbound traffic is otherwise restricted. The disclosed information is limited to values exposed to the Fleet templating context and to name resolution results. Integrity and availability of managed clusters are not affected. This issue affects Fleet: from 0.12.0 before 0.12.19, from 0.13.0 before 0.13.15, from 0.14.0 before 0.14.10, from 0.15.0 before 0.15.6, and from 0.16.0 before 0.16.1.
Affected products
- SUSE Fleet: from 0.12.0 before 0.12.19; from 0.13.0 before 0.13.15; from 0.14.0 before 0.14.10; from 0.15.0 before 0.15.6; from 0.16.0 before 0.16.1 — fixed in 0.12.19, 0.13.15, 0.14.10, 0.15.6, 0.16.1
How to fix
Upgrade to a fixed version: SUSE Fleet 0.12.19, 0.13.15, 0.14.10, 0.15.6. Check the vendor advisory for mitigations.
References
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