Fleet: DNS exfiltration via Sprig getHostByName in fleet.yaml Helm template preprocessing (CVE-2026-75036) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-75036

Fleet: DNS exfiltration via Sprig getHostByName in fleet.yaml Helm template preprocessing

Answer in brief

CVE-2026-75036 records a Unknown severity vulnerability in Fleet: DNS exfiltration via Sprig getHostByName in fleet.yaml Helm template preprocessing. The current sources do not mark it as known exploited. The current feed maps SUSE/Fleet (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 3, 2026Updated Sep 3, 2026Source checked Sep 3, 2026First seen by HOL Sep 3, 2026Material review Sep 3, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps SUSE/Fleet (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
SUSE/Fleetgeneric	>=0.12.0 <0.12.19 \|\| >=0.13.0 <0.13.15 \|\| >=0.14.0 <0.14.10 \|\| >=0.15.0 <0.15.6 \|\| >=0.16.0 <0.16.1	0.12.19, 0.13.15, 0.14.10, 0.15.6, 0.16.1

Recommended response

Check inventory. Check lockfiles and deployed manifests for SUSE/Fleet.
Review the reported fix. Update SUSE/Fleet to 0.12.19 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 3, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 3, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 3, 2026

Sources and claim methodology

GitHub security advisorygithub.com

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.