CVE-2026-88808

high

A vulnerability has been identified within Rancher Manager where the Fleet agent wrote resources to downstream clusters using its own cluster-admin credentials…

Vendor / product: Suse — rancher fleet

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

8.8

8.8 (CVSS v3.1)

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

Severity source: NVD CVSS v3.1 (meissner@suse.de)

Timeline (UTC)

Published: 2026-09-28 16:17

Modified: 2026-10-07 17:00

NVD status: Analyzed

Last synced 2 days ago

Verified against the source API 2026-10-27 06:56 UTC

Exploitation

Not listed in CISA KEV (as of last catalog sync)

Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).

Affected products

suse / rancher_fleet ≥0.14.0 <0.14.11, ≥0.15.0 <0.15.7, ≥0.16.0 <0.16.2

Weakness classification (CWE)

CWE-250

Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.

Mitigation & advisories

Vendor advisory: https://github.com/rancher/fleet/security/advisories/GHSA-q9v4-358v-r8q5

References

https://github.com/rancher/fleet/security/advisories/GHSA-q9v4-358v-r8q5 meissner@suse.de

Data sources

NVD CVE API 2.0 — fetched 2026-10-27 06:56 UTC · record ↗

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CVE-2026-88808

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