CVE-2026-93540

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.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

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

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:suse:rancher_fleet::::::::
	cpe:2.3:a:suse:rancher_fleet::::::::
	cpe:2.3:a:suse:rancher_fleet::::::::
	cpe:2.3:a:suse:rancher_fleet::::::::

History

07 Oct 2026, 17:03

Type	Values Removed	Values Added
CPE		cpe:2.3:a:suse:rancher_fleet::::::::
First Time		Suse Suse rancher Fleet
References	~~() https://github.com/rancher/fleet/security/advisories/GHSA-m93g-8438-2cgg -~~	() https://github.com/rancher/fleet/security/advisories/GHSA-m93g-8438-2cgg - Vendor Advisory

28 Sep 2026, 15:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-28 15:17

Updated : 2026-10-07 17:03

NVD link : CVE-2026-93540

Mitre link : CVE-2026-93540

CVE.ORG link : CVE-2026-93540

JSON object : View

Products Affected

suse

rancher_fleet

CWE

CWE-266

Incorrect Privilege Assignment

{"id": "CVE-2026-93540", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-93540", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-09-28T15:25:53.294940Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "meissner@suse.de", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 2.8}]}, "affected": [{"source": "meissner@suse.de", "affectedData": [{"repo": "https://github.com/rancher/fleet/", "vendor": "SUSE", "product": "Rancher", "versions": [{"status": "affected", "version": "0.16.0", "lessThan": "0.16.1", "versionType": "semver"}, {"status": "affected", "version": "0.15.0", "lessThan": "0.15.7", "versionType": "semver"}, {"status": "affected", "version": "0.14.0", "lessThan": "0.14.11", "versionType": "semver"}, {"status": "affected", "version": "0.13.0", "lessThan": "0.13.16", "versionType": "semver"}], "packageName": "Fleet", "defaultStatus": "unaffected"}]}], "published": "2026-09-28T15:17:25.220", "references": [{"url": "https://github.com/rancher/fleet/security/advisories/GHSA-m93g-8438-2cgg", "tags": ["Vendor Advisory"], "source": "meissner@suse.de"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "meissner@suse.de", "description": [{"lang": "en", "value": "CWE-266"}]}], "descriptions": [{"lang": "en", "value": "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.\n\nThis 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."}], "lastModified": "2026-10-07T17:03:05.373", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:suse:rancher_fleet:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "87C06F2C-7A69-4011-B64A-FEE48285E24F", "versionEndExcluding": "0.13.16", "versionStartIncluding": "0.13.0"}, {"criteria": "cpe:2.3:a:suse:rancher_fleet:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C5143457-F2CD-4F48-BAD8-13A33A262112", "versionEndExcluding": "0.14.11", "versionStartIncluding": "0.14.0"}, {"criteria": "cpe:2.3:a:suse:rancher_fleet:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7207500A-074F-4806-B754-12208EA6E30F", "versionEndExcluding": "0.15.7", "versionStartIncluding": "0.15.0"}, {"criteria": "cpe:2.3:a:suse:rancher_fleet:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "38F17767-68ED-4F10-BCD6-590C99E8F478", "versionEndExcluding": "0.16.1", "versionStartIncluding": "0.16.0"}], "operator": "OR"}]}], "sourceIdentifier": "meissner@suse.de"}