CVE-2025-71261: Harvester's SUSE Virtualization Registration Client Vulnerable to MITM and DOS

Impact A vulnerability has been identified in the [SUSE Virtualization (Harvester) Rancher integration mechanism](https://docs.harvesterhci.io/v1.7/rancher/rancher-integration) where by default the registration client u…

8.6CVSS Score

HIGHSeverity

NOCISA KEV

VulnerabilityImpact Type

📋 Vulnerability Details

CVE ID	CVE-2025-71261
Vendor	go
Affected Product	github.com/harvester/harvester
Vulnerability Type	Vulnerability
CVSS Score	8.6 (HIGH)
Actively Exploited	❌ No known exploitation
Patch Status	See Vendor Advisory →
Reported By	CYBERDUDEBIVASH SENTINEL APEX Intelligence (via github_advisories)

🔬 Technical Analysis

Impact A vulnerability has been identified in the [SUSE Virtualization (Harvester) Rancher integration mechanism](https://docs.harvesterhci.io/v1.7/rancher/rancher-integration) where by default the registration client uses an insecure TLS option that fails to verify the remote server’s certificate. This security gap could allow the execution of a man-in-the-middle (MitM) attack against SUSE Virtualization. An attacker with network-level access between the SUSE Virtualization and Rancher Manager could interfere with the TLS handshake and abuse it to bypass TLS as a security control. The registration client could be misled to send cluster registration requests to an impersonated remote service. Additionally, because the system processes response payloads without performing size validatio

🎯 Known Indicators of Compromise

{"type":"url","value":"https://docs.harvesterhci.io/v1.7/rancher/rancher-integration)","confidence_score":0.82,"first_seen":"2026-05-06","source_count":1} {"type":"domain","value":"docs.harvesterhci.io","confidence_score":0.75,"first_seen":"2026-05-06","source_count":1}

📚 Advisory References

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