TI-2026-83200 Aliases CVE-2026-104615

Cluster identity not bound to token in SUSE Rancher Fleet

LOW 34CWE-290Published 2026-10-30 · Updated 2026-11-06

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-290.

Summary

SUSE Rancher Fleet versions through 0.12, from 0.13 before 0.13.17, from 0.14.0 before 0.14.12, from 0.15.0 before 0.15.17 and from 0.16.0 before 0.16.3 are affected. The cluster identity claimed by a registration request is accepted without being bound to the registration token used for that request, a case of CWE-290 authentication bypass by spoofing. A remote attacker with high privileges and high attack complexity can associate a registration request with a managed cluster that was originally registered with a different token.

Written with Claude Haiku 5.5 from the sources below · 2026-10-30

Description from the CNA

A security vulnerability was discovered in SUSE Rancher Fleet's cluster registration flow, in Fleet versions before 0.12, 0.13.0 up to 0.13.17, 0.14.0 up to 0.14.12, 0.15.0 up t o 0.15.17 and 0.16.0 up to 0.16.3. The cluster identity claimed by a registration request was accepted without being bound to the registration token that the request was made with. As a result, a registration request could be associated with a managed cluster that was originally registered with a different registration token.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00221 12th percentileScored 2026-11-07

Fix Fixed Rancher (SUSE): 0.16.3, 0.15.17, 0.14.12 +1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

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

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
SUSE	Rancher	0.16.0 to before 0.16.3; 0.15.0. to before 0.15.17; 0.14.0 to before 0.14.12; 0.13 to before 0.13.17; up to 0.12	0.16.3, 0.15.17, 0.14.12, 0.13.17	Patch available	CNA

Rancher VendorSUSE Affected 0.16.0 to before 0.16.3; 0.15.0. to before 0.15.17; 0.14.0 to before 0.14.12; 0.13 to before 0.13.17; up to 0.12 Fixed in 0.16.3, 0.15.17, 0.14.12, 0.13.17 Patch available CNA

Remediation

Upgrade Fleet to 0.13.17, 0.14.12, 0.15.17 or 0.16.3, matching your release line.

Written with Claude Haiku 5.5 from the sources below · 2026-10-30

Fix · CNA Rancher (SUSE) Fixed in 0.16.3, 0.15.17, 0.14.12, 0.13.17

Timeline

2026-10-30 Threatist record created from CVE-2026-104615
2026-11-01 Priority changed: MEDIUM → LOW
2026-11-06 CISA SSVC decision points changed

References

Advisory 1

https://github.com/rancher/fleet/security/advisories/GHSA-gx8v-2929-9q95

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Sources

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