CVE-2025-71261
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedAn 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.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceA network-level attacker positioned between SUSE Virtualization and Rancher Manager in SUSE Harvester versions before 1.8.0 can interfere with the TLS handshake process, allowing the attacker to bypass TLS security controls and potentially intercept or manipulate encrypted communications.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- Low
- Integrity
- Low
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
-
Identify installed Harvester versionUse system management tools or check the Harvester cluster status to retrieve the currently deployed version number (e.g., `kubectl get harvester -o jsonpath='{.items[].status.version}'` or via the Harvester UI dashboard)Affected if The installed version is lower than 1.8.0 (e.g., 1.7.x, 1.6.x, or earlier)
-
Determine if Rancher Manager integration is activeCheck whether Harvester is configured to communicate with a Rancher Manager instance, as the vulnerability affects the TLS handshake between SUSE Virtualization and Rancher ManagerAffected if Rancher Manager integration is enabled and the virtualization layer communicates with it over TLS
-
Assess network exposure between virtualization and management planesEvaluate network topology and access controls to determine if an unauthenticated network-level attacker could position themselves between the Harvester virtualization hosts and the Rancher Manager server (e.g., review firewall rules, VLAN segmentation, VPN status, and whether the network path traverses untrusted segments)Affected if The network path between Virtualization and Rancher Manager is accessible to untrusted actors or lacks proper segmentation, allowing a man-in-the-middle position
You are affected if Harvester version is below 1.8.0 AND Rancher Manager integration is active AND an attacker could potentially intercept network traffic between the virtualization and management layers.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
dbcve · scopedUpgrade SUSE Harvester to version 1.8.0 or later to obtain the fix. Additionally, enforce network segmentation to restrict unauthorized network-level access between virtualization and management infrastructure.
SUSE Harvester 1.8.0
- 1. Back up all critical data and configurations for your SUSE Harvester installation
- 2. Review the SUSE Harvester 1.8.0 release notes for any pre-upgrade requirements or migration procedures
- 3. Upgrade SUSE Harvester to version 1.8.0 or later
- 4. After upgrade, verify that TLS certificate validation is functioning correctly between SUSE Virtualization and Rancher Manager components
- 5. Test network connectivity and ensure all services start successfully
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $5,600.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-71261 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2025-71261 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data