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CVE-2026-88808

Suse Rancher Fleet privilege escalation

8.8 HIGHEPSS 0.28%
  1. Published28 Sept 2026

Description

A vulnerability has been identified within Rancher Manager where the Fleet agent wrote resources to downstream clusters using its own cluster-admin credentials instead of the ServiceAccount pinned to the deployment. It affects multi-tenancy environments where different tenants share the same downstream clusters, for example different privileged or untrusted teams inside the same organization. This could lead to overwritten configuration files. This issue affected SUSE Rancher Fleet 0.16 before 0.16.2, 0.15 before 0.15.7, and 0.14 before 0.14.11.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

Suse Rancher Fleet≥ 0.14.0 < 0.14.11 · ≥ 0.15.0 < 0.15.7 · ≥ 0.16.0 < 0.16.2

Remediation

Fixed in
Suse Rancher Fleet≥ 0.14.11

References

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Frequently asked

Is CVE-2026-88808 being actively exploited?

CVE-2026-88808 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.28%.

How severe is CVE-2026-88808?

CVE-2026-88808 has a CVSS 3.1 base score of 8.8, rated high. EPSS estimates a 0.28% probability of exploitation.

Which products are affected by CVE-2026-88808?

Affected products include Suse Rancher Fleet.

How do I fix CVE-2026-88808?

Upgrade affected software to a fixed version, for example Suse Rancher Fleet 0.14.11 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-88808 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.