November 14, 2026

CVE Watchtower

CVE-2026-93538Suse Rancher Fleet

NVDCVSS scored by meissner@suse.de

Vulnerability Summary

A cross-tenant authorization issue was discovered in SUSE Rancher Fleet. During agent-initiated cluster registration, cluster labels supplied by the registering agent, including labels in the reserved management.cattle.io/ namespace such as the cluster display name label, were applied to the resulting upstream Cluster object. Because Fleet resolves GitRepo and Bundle targets from those cluster labels, a party able to register a cluster into a Fleet workspace namespace shared with other tenants could cause its own cluster to satisfy targeting rules that administrators intended for a different cluster.
This affects SUSE Rancher Fleet 0.16 before 0.16.1, 0.15 before 0.15.6, 0.14 before 0.14.10, 0.13 before 0.13.15, 0.12 before 0.12.19 and older versions.
Severity Level
HIGH(7.1)
Published Date
Sep 28, 2026
Last Modified
Oct 7, 2026
Exploitation Status
No confirmed exploitation yet
EPSS Score (30-Day)
0.17%Probability
Root Weakness (CWE)
CWE-290 ↗
See the MITRE CWE entry for the full definition of this weakness.
CWE-639: Authorization Bypass Through User-Controlled Key ↗
The system does not prevent one user from accessing another user data or record by modifying the key value identifying the data.
CVSS v3.1 Base Metrics — Score 7.1 (HIGH)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityLow
AvailabilityNone

Affected & Patched Versions

Affected Versions
  • Suse Rancher Fleet >= 0.12.0 and < 0.12.19
  • Suse Rancher Fleet >= 0.13.0 and < 0.13.15
  • Suse Rancher Fleet >= 0.14.0 and < 0.14.10
  • Suse Rancher Fleet >= 0.15.0 and < 0.15.6
  • Suse Rancher Fleet >= 0.16.0 and < 0.16.1
Patched Versions
  • Suse Rancher Fleet 0.12.19
  • Suse Rancher Fleet 0.13.15
  • Suse Rancher Fleet 0.14.10
  • Suse Rancher Fleet 0.15.6
  • Suse Rancher Fleet 0.16.1

What to do

Plan remediation soon. No exploitation is confirmed yet, but the severity is high.

  1. Check whether you run Suse Rancher Fleet and which version.
  2. Update to a patched version listed above, then confirm the new version.

Timeline

  • Sep 28, 2026Published
  • Oct 7, 2026Record last modified

Score, severity and exploitation changes are tracked from the day Watchtower started logging them.

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External References

Data last checked: Nov 14, 2026 13:06 UTC