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TI-2026-83874 Aliases CVE-2026-94290

Rancher Fleet flaw lets users gain cluster-admin on the local cluster

Priority MEDIUM 42CWE-250Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
None
Attack complexity
Low
Impact type
Privilege escalation
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-250.

Summary

SUSE Rancher Fleet from 0.16.0 before 0.16.3, from 0.15.0 before 0.15.8, from 0.14.0 before 0.14.12 and from 0.13.0 before 0.13.17 is affected, and possibly older versions. The Fleet controller does not sufficiently restrict which kubeconfig secrets a Fleet Cluster object can reference (CWE-250). A user who controls a namespace can associate a Fleet cluster there with administrative credentials for the management cluster, so the controller runs that user's Fleet content on it with elevated privileges.

Written with Claude Haiku 5.5 from the sources below · 2026-11-02

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00499 43rd percentileScored 2026-11-07
Fix Fixed Rancher (SUSE): 0.16.3, 0.15.8, 0.14.12 +1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
SUSERancher0.16.0 to before 0.16.3; 0.15.0 to before 0.15.8; 0.14.0 to before 0.14.12; 0.13.0 to before 0.13.170.16.3, 0.15.8, 0.14.12, 0.13.17Patch availableCNA
  • Rancher VendorSUSE Affected 0.16.0 to before 0.16.3; 0.15.0 to before 0.15.8; 0.14.0 to before 0.14.12; 0.13.0 to before 0.13.17 Fixed in 0.16.3, 0.15.8, 0.14.12, 0.13.17 Patch available CNA

Remediation

Fixed versions of SUSE Rancher Fleet are 0.16.3, 0.15.8, 0.14.12 and 0.13.17. Upgrade to the fixed version in your release line.

Written with Claude Haiku 5.5 from the sources below · 2026-11-02

  • Fix · CNA Rancher (SUSE) Fixed in 0.16.3, 0.15.8, 0.14.12, 0.13.17

Timeline

  1. 2026-11-02 Threatist record created from CVE-2026-94290
  2. 2026-11-02 CISA SSVC decision points changed
  3. 2026-11-02 Priority changed: MEDIUM → LOW
  4. 2026-11-03 CISA SSVC decision points changed
  5. 2026-11-04 Priority changed: LOW → MEDIUM

References

Advisory 1

  • TI-2016-03560 Unspecified vulnerability in Adobe Flash Player 21.0.0.242 and earlier allows remote… KEVCVSS 3.1CRITICAL 9.8
  • TI-2016-03506 Adobe Flash Player 21.0.0.226 and earlier allows remote attackers to execute arbitrary… KEVCVSS 3.1CRITICAL 9.8
  • TI-2016-02888 Unspecified vulnerability in Oracle Java SE 6u113, 7u99, and 8u77; Java SE Embedded 8u77… KEVCVSS 3.1CRITICAL 9.8
  • TI-2015-04302 Use-after-free vulnerability in the BitmapData class in the ActionScript 3 (AS3)… KEVCVSS 3.1CRITICAL 9.8
  • TI-2015-04301 Use-after-free vulnerability in the DisplayObject class in the ActionScript 3 (AS3)… KEVCVSS 3.1CRITICAL 9.8
  • TI-2015-04298 Use-after-free vulnerability in the ByteArray class in the ActionScript 3 (AS3)… KEVCVSS 3.1CRITICAL 9.8
See all 1331 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences