Vulnerability in SUSE Rancher
CVE-2026-88808
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/rancher/fleet/security/advisories/GHSA-q9v4-358v-r8q5 (vendor-advisory)
Frequently asked questions
- What is CVE-2026-88808?
- CVE-2026-88808 is a high-severity vulnerability in SUSE Rancher, classified under CWE-250. CVSS score: 8.8/10. Published 2026-09-28.
- How severe is CVE-2026-88808?
- High severity. CVSS v3 base score is 8.8 out of 10.