Allows ordinary users to escalate to management-cluster admin and run arbitrary Fleet workloads; impacts widely deployed Rancher Fleet used to manage Kubernetes fleets.
CVE-2026-94290
Privilege escalation in Rancher Fleet lets users run admin workloads on the management cluster.
Is CVE-2026-94290 being exploited?
Not confirmed. CVE-2026-94290 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked.
How severe is CVE-2026-94290?
CVE-2026-94290 is rated Critical with a CVSS score of 9.1. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-94290?
Yes. A fix has been recorded for CVE-2026-94290. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-94290 affect?
CVE-2026-94290 affects SUSE Rancher Fleet 0.13.0–0.13.17, SUSE Rancher Fleet 0.14.0–0.14.12, SUSE Rancher Fleet 0.15.0–0.15.8, SUSE Rancher Fleet 0.16.0–0.16.3, and 1 further product or version. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-94290?
Block untrusted kubeconfig secrets, restrict secret access, rotate admin creds, and upgrade Fleet when vendor patch is published.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
A malicious/unauthorized Fleet Cluster can reference an admin kubeconfig, enabling controller to execute arbitrary workloads on the management cluster with admin privileges.
Immediate action required
- affected>= 0.16.0 and < 0.16.3
- affected>= 0.15.0 and < 0.15.8
- affected>= 0.14.0 and < 0.14.12
- affected>= 0.13.0 and < 0.13.17
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.
cisa ssvc
- exploitation
- none
- automatable
- no
- technical impact
- total
Assessed by CISA 2 Nov 2026 (SSVC 2.0.3).
timeline
- 2 Nov 2026CISA SSVC assessment: exploitation none
- 2 Nov 2026Published · 1 day later
- 3 Nov 2026CVE record last updated · 1 day later
- 3 Nov 2026Analysed by vulneraibility.com · same day later
also known as
- Advisorygithub.com /rancher/fleet/security/advisories/GHSA-qfmw-gw96-ffcr
sources
- CVE List (CVE.org): description, affected versions, references; CVE Terms of Use
- NVD: CVSS and CPE data
- CISA Vulnrichment (ADP): SSVC decision points
- FIRST EPSS: exploit probability and percentile
- OSV: advisory aliases and downstream package versions
- Summary, impact and triage tags: written by our AI analysis pipeline from the sources above. Check them against the sources.