Gardener: Authorization Bypass via Group Subject Injection

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-79767
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-22 20:17:08 UTC
Updated2026-09-23 18:12:04 UTC
DescriptionGardener implements the automated management and operation of Kubernetes clusters as a service. Prior to 1.142.6, 1.143.3, 1.144.2, and 1.145.0, the customverbauthorizer admission plugin's mustCheckProjectMembers manage-members check compares changes to User subjects but does not account for Group or ServiceAccount subjects in Project.spec.members. A project administrator who lacks manage-members permission can add arbitrary Group or ServiceAccount subjects, including the system:authenticated Group, and thereby grant broad project access. The resulting access can include Shoots, Secrets, and cloud provider credentials. This issue is fixed in versions 1.142.6, 1.143.3, 1.144.2, and 1.145.0.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:N

EPSS: 0.003890000 probability, percentile 0.301800000 (date 2026-09-24)

Problem Types: CWE-863 | CWE-863 CWE-863: Incorrect Authorization

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:N
3.1CNADECLARED5.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
High
Availability
None

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Gardener Gardener affected < 1.142.6 Not specified
CNA Gardener Gardener affected >= 1.143.0, < 1.143.3 Not specified
CNA Gardener Gardener affected >= 1.144.0, < 1.144.2 Not specified

References

ReferenceSourceLinkTags
github.com/gardener/gardener/releases/tag/v1.144.2 [email protected] github.com
github.com/gardener/gardener/security/advisories/GHSA-gfjv-gqf2-c888 [email protected] github.com
github.com/gardener/gardener/pull/15080 [email protected] github.com
github.com/gardener/gardener/commit/63751db97dca6cc5ee5f966d4963415de6ae... [email protected] github.com
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