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CVE-2026-94290

Privilege escalation to cluster-admin on the Rancher local cluster through Fleet's agent management controller

CVSS score

9.1

EPSS probability

—

Risk score

0.9

Published

3 h ago

OverviewPublic Exploits (0)NewsroomVulnerability Timeline
Patch status has not yet been verified

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Vulnerability description

DayBreach AI Explanation

Verified against sources

CVE-2026-94290: Privilege Escalation in Rancher Fleet Agent Management Controller

Sources read

1

Source agreement

Tam uyum

Evidence confidence

%55

Short explanation

Insufficient kubeconfig secret restrictions in SUSE Rancher Fleet allow ordinary users to associate management cluster credentials and attain cluster-admin privileges.

Why does it matter?

This vulnerability enables low-privileged users to obtain elevated privileges over the management cluster, posing a complete compromise risk.

What should be done?

  • Follow official vendor advisories and updates
  • Audit Fleet cluster kubeconfig secret references
  • Restrict access permissions in user-controlled namespaces
Chain of evidence and sources2 verified claims

CVE-2026-94290, Fleet ajan yönetimi denetleyicisindeki yetersiz kubeconfig secret kısıtlamasından kaynaklanır.

S0 · daybreach-canonicalS1 · cvelist

Açıklık, SUSE Rancher Fleet 0.16.0 ila 0.16.3, 0.15.0 ila 0.15.8, 0.14.0 ila 0.14.12 ve 0.13.0 ila 0.13.17 sürümlerini etkiler.

S0 · daybreach-canonicalS1 · cvelist
Show the technical text from the sources

SUSE Rancher Fleet clusters reference a kubeconfig secret that the controller uses to install and manage a Fleet agent on the target cluster. The controller did not sufficiently restrict which kubeconfig secrets a Fleet Cluster object was allowed to reference. As a result, a Fleet cluster defined in a namespace an ordinary user controls could be associated with administrative credentials for the management cluster itself, causing the controller to manage the management cluster on that user's behalf and to run that user's Fleet content there with elevated privileges. This affects SUSE Rancher Fleet 0.16.0 up to 0.16.3, 0.15.0 up to 0.15.8, 0.14.0 up to 0.14.12, 0.13.0 up to 0.13.17 and possible older versions.

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

CWE: CWE-250

This explanation was compiled automatically from the source records. Scores, active exploitation, patch and exploit status come straight from the sources.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-94290 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1suserancher View
Total affected vendors: 1|Products: 1

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCOREVERSIONSEVERITYVECTORSOURCE
9.1CVSS V31CRITICALCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:HNVD
9.1CVSS V3_1CRITICALCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:HCVE CNA

Patch and Remediation Guide

Solution & Remediation Advisory

Patch status unknown

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Confirm the affected product and version against the source evidence above.
Restrict access to internet-facing services and apply network segmentation.
Until a patch is confirmed, follow the vendor advisory; do not read an unknown status as “no patch”.
Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-94290 is associated with the following CWEs:

CWE-250: Common Weakness Enumeration Entry CWE-250

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-94290 weaknesses.

CAPEC-66: SQL InjectionCAPEC-126: Path TraversalCAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden
PermissionsHigh
UserGerekmiyor

Official Sources and Advisories

https://github.com/rancher/fleet/security/advisories/GHSA-qfmw-gw96-ffcrvendor-advisory

CVSS Vector Radar Chart

9.1 / 10
Attack VectorNetworkComplexityLowPrivilegesHighUser Interact.NoneConfidentialityLowIntegrityNoneAvailabilityHigh

Vulnerability Scoring Details

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredHigh privileges
User InteractionNone required
Confidentiality (Gizlilik)Low
Integrity (Bütünlük)None
Availability (Erişilebilirlik)High

Yama durumu bilinmiyor

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Weakness Type (CWE & CAPEC)

CWE-250

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CVE-2026-94290 · Privilege escalation to cluster-admin on…