CVE-2025-71261Published

Harvester's SUSE Virtualization Registration Client Vulnerable to MITM and DOS

Collected exploitation and prediction evidence

CISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.

No collected risk observation for these identifiers. This does not establish absence of exploitation or a zero probability.

cve-program · CVE-2025-71261

Published

An attacker with network-level access between the SUSE Virtualization and Rancher Manager in SUSE Harvester before 1.8.0 could interfere with the TLS handshake and abuse it to bypass TLS as a security control.

Source published: 16 Jun 2026 15:42:32 UTC
Source modified: 16 Jun 2026 17:52:30 UTC
Observed here: 23 Oct 2026 15:48:27 UTC
Source terms: CVE Program Terms of Use

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CVSS 3.1 · 8.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

euvd · EUVD-2025-210170

Published

EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.

Original publisher date fields

datePublished: Jun 16, 2026, 3:42:32 PM

dateUpdated: Jun 16, 2026, 5:52:30 PM

Source published: Jun 16, 2026, 3:42:32 PM (timezone not stated)
Source modified: Jun 16, 2026, 5:52:30 PM (timezone not stated)
Observed here: 11 Nov 2026 04:37:09 UTC
Source terms: ENISA EUVD · source terms and attribution apply

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EUVD CVSS 3.1 · 8.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

nvd · CVE-2025-71261

Published

NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.

Source analysis status: Awaiting Analysis

Weakness classifications: CWE-295

Original publisher date fields

published: 2026-06-16T17:16:30.193

lastModified: 2026-10-07T08:10:00.200

Source published: 16 Jun 2026 17:16:30 UTC
Source modified: 7 Oct 2026 08:10:00 UTC
Observed here: 25 Oct 2026 04:17:18 UTC
Source terms: NIST NVD usage terms; underlying source attribution retained

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CVSS 3.1 · [email protected] · Secondary · 8.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

osv · GHSA-pgh9-mpwc-8jjf

Published

### 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 validation, an attacker could induce a memory buffer overflow, leading to a potential crash of the SUSE Virtualization registration controller. Note that this vulnerability only affects the cluster registration configuration (the `cluster-registration-url` setting) which is distinct from the secured configuration used to maintain operational connectivity between SUSE Virtualization and Rancher Manager, as well as between the manager and hosted downstream clusters. Please consult the associated[ MITRE ATT&CK - Technique - Adversary-in-the-Middle](https://attack.mitre.org/techniques/T1557/) and [MITRE ATT&CK - Technique - Endpoint Denial of Service: Application or System Exploitation](https://attack.mitre.org/techniques/T1499/004/) for further information about this category of attack. ### Patches This vulnerability is addressed by updating the registration client’s default behaviour to validate the certificate presented by the remote server against the list of trusted system root certificate authority (CA) and those defined by the `additional-ca` setting. Patched versions of SUSE Virtualization include releases v1.8.0 or newer. ### Workarounds If developers can't upgrade to a fixed version, ensure that only authorized cluster administrators can access and modify the `cluster-registration-url` setting. ### Resources If there are any questions or comments about this advisory: * Reach out to the [SUSE Rancher Security team](https://github.com/rancher/rancher/security/policy) for security related inquiries. * Open an issue in the [Rancher](https://github.com/rancher/rancher/issues/new/choose) repository. * Verify with SUSE [support matrix](https://www.suse.com/suse-rancher/support-matrix/all-supported-versions/) and [product support lifecycle](https://www.suse.com/lifecycle/).

Source published: 6 May 2026 20:16:08 UTC
Source modified: 10 Sep 2026 03:51:06 UTC
Observed here: 24 Oct 2026 13:19:41 UTC
Source terms: GitHub Advisory Database · CC-BY-4.0

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CVSS_V3 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

Publisher rating · HIGH

osv · GO-2026-5538

Published

Harvester's SUSE Virtualization Registration Client Vulnerable to MITM and DOS in github.com/harvester/harvester

Source published: 25 Jun 2026 22:34:34 UTC
Source modified: 28 Jul 2026 03:14:45 UTC
Observed here: 24 Oct 2026 13:19:41 UTC
Source terms: OSV · upstream source license applies

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This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · OSV · upstream source license applies. Source text is retained; field grouping and change labels are provided by ChangeIntel.