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TI-2026-83909 Aliases CVE-2026-88810

Privilege escalation in Rancher downstream clusters via GlobalRole

Priority LOW 34CWE-306Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-306.

Summary

SUSE Rancher 2.15.2 and SUSE Rancher Webhook from 0.11.0 before 0.11.4 and from 0.12.0 before 0.12.1 are affected. The inheritedNamespacedRules field of a GlobalRole skips the privilege escalation validation applied to other permission fields (CWE-306). A non-administrative user with a global role binding can gain permissions in downstream clusters that exceed their own.

Written with Claude Haiku 5.5 from the sources below · 2026-11-05

Description from the CNA

A privilege escalation issue was discovered in Rancher Manager's role-based access control. The inheritedNamespacedRules field of a GlobalRole propagates permissions into named namespaces of every downstream cluster managed by the Rancher instance, but it was not subject to the privilege-escalation validation applied to the other permission-carrying fields of a GlobalRole. As a result, a non-administrative user could be granted, through a global role  binding, permissions in downstream clusters that exceed the permissions that user already holds. This affected SUSE Rancher 2.15.2 only, and SUSE Rancher Webhook 0.11.0 up to 0.11.4, and 0.12.0 up to 0.12.1.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00476 41st percentileScored 2026-11-07
Fix Fixed Rancher (SUSE): 2.15.3, 0.11.4, 0.12.1

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
SUSERancher2.15.2 to before 2.15.32.15.3Patch availableCNA
SUSERancher0.11.0 to before 0.11.4; 0.12.0 to before 0.12.10.11.4, 0.12.1Patch availableCNA
  • Rancher VendorSUSE Affected 2.15.2 to before 2.15.3 Fixed in 2.15.3 Patch available CNA
  • Rancher VendorSUSE Affected 0.11.0 to before 0.11.4; 0.12.0 to before 0.12.1 Fixed in 0.11.4, 0.12.1 Patch available CNA

Remediation

Upgrade SUSE Rancher to 2.15.3. Upgrade SUSE Rancher Webhook to 0.11.4 or 0.12.1.

Written with Claude Haiku 5.5 from the sources below · 2026-11-05

  • Fix · CNA Rancher (SUSE) Fixed in 2.15.3
  • Fix · CNA Rancher (SUSE) Fixed in 0.11.4, 0.12.1

Timeline

  1. 2026-11-02 Threatist record created from CVE-2026-88810
  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

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