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CVE-2026-93540

Fleet applies namespace labels and annotations without the bundle's service account privileges

MEDIUM
6.5
CVSS Score
Published: September 28, 2026 at 02:45 PM UTC
Updated: October 7, 2026 at 05:03 PM UTC
2 products affected across 2 vendorsRancherRancher Fleet

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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

A privilege mismatch was found in Fleet. When a bundle requested namespace labels or annotations through the namespaceLabels and namespaceAnnotations options, the resulting namespace metadata update was not subject to the same authorization as the rest of the bundle's deployment. As a result, a bundle could change labels and annotations on a target namespace even when the identity it was pinned to was not authorized to modify that namespace. This affected SUSE Rancher Fleet 0.16 before 0.16.2, 0.15 before 0.15.7, 0.14 before 0.14.11, 0.13 before 0.13.16 and potentially older versions.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Rancher· Rancher
95%
0.13.0 ≤ v < 0.13.160.14.0 ≤ v < 0.14.110.15.0 ≤ v < 0.15.70.16.0 ≤ v < 0.16.10.13.00.14.00.15.00.16.0
Affected range stops below 0.13.16, so it looks safe — our inference, not a vendor statement
Affected range stops below 0.14.11, so it looks safe — our inference, not a vendor statement
Affected range stops below 0.15.7, so it looks safe — our inference, not a vendor statement
Affected range stops below 0.16.1, so it looks safe — our inference, not a vendor statement
Rancher Fleet· SUSE
95%
0.13.0 ≤ v < 0.13.160.14.0 ≤ v < 0.14.110.15.0 ≤ v < 0.15.70.16.0 ≤ v < 0.16.1
Affected range stops below 0.13.16, so it looks safe — our inference, not a vendor statement
Affected range stops below 0.14.11, so it looks safe — our inference, not a vendor statement
Affected range stops below 0.15.7, so it looks safe — our inference, not a vendor statement
Affected range stops below 0.16.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor Advisory
Source: cverecord
https://github.com/rancher/fleet/security/advisories/GHSA-m93g-8438-2cgg

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUMsuse
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-266

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