Auth bypass in Gardener
CVE-2026-79767
Gardener 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.
Vulnerability class: Broken Access Control
Published .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Gardener — versions < 1.142.6, >= 1.143.0, < 1.143.3, >= 1.144.0, < 1.144.2
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-79767?
- CVE-2026-79767 is a medium-severity vulnerability in Gardener, classified under Incorrect Authorization. CVSS score: 5.5/10. Published 2026-09-22.
- How severe is CVE-2026-79767?
- Medium severity. CVSS v3 base score is 5.5 out of 10.