{"id":"CVE-2026-79767","state":"PUBLISHED","title":"Gardener: Authorization Bypass via Group Subject Injection","description":"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.","publishedAt":"2026-09-22T19:58:00.090Z","updatedAt":"2026-09-23T14:36:18.501Z","severity":{"score":5.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["gardener gardener"],"affected":[{"vendor":"gardener","product":"gardener","versions":[{"version":"< 1.142.6","status":"affected"},{"version":">= 1.143.0, < 1.143.3","status":"affected"},{"version":">= 1.144.0, < 1.144.2","status":"affected"}]}],"references":["https://github.com/gardener/gardener/security/advisories/GHSA-gfjv-gqf2-c888","https://github.com/gardener/gardener/pull/15080","https://github.com/gardener/gardener/commit/63751db97dca6cc5ee5f966d4963415de6ae5545","https://github.com/gardener/gardener/releases/tag/v1.144.2"],"weaknesses":["CWE-863"],"ingestedAt":"2026-10-29T20:13:07.220Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/79xxx/CVE-2026-79767.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-79767","state":"PUBLISHED","datePublished":"2026-09-22T19:58:00.090Z","dateUpdated":"2026-09-23T14:36:18.501Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-08-25T14:08:18.112Z"},"containers":{"cna":{"title":"Gardener: Authorization Bypass via Group Subject Injection","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"gardener","product":"gardener","versions":[{"version":"< 1.142.6","status":"affected"},{"version":">= 1.143.0, < 1.143.3","status":"affected"},{"version":">= 1.144.0, < 1.144.2","status":"affected"}]}],"references":[{"url":"https://github.com/gardener/gardener/security/advisories/GHSA-gfjv-gqf2-c888","name":"https://github.com/gardener/gardener/security/advisories/GHSA-gfjv-gqf2-c888","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/gardener/gardener/pull/15080","name":"https://github.com/gardener/gardener/pull/15080","tags":["x_refsource_MISC"]},{"url":"https://github.com/gardener/gardener/commit/63751db97dca6cc5ee5f966d4963415de6ae5545","name":"https://github.com/gardener/gardener/commit/63751db97dca6cc5ee5f966d4963415de6ae5545","tags":["x_refsource_MISC"]},{"url":"https://github.com/gardener/gardener/releases/tag/v1.144.2","name":"https://github.com/gardener/gardener/releases/tag/v1.144.2","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.5,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"HIGH","privilegesRequired":"HIGH","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-863","lang":"en","description":"CWE-863: Incorrect Authorization","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-09-22T19:58:00.090Z"},"source":{"advisory":"GHSA-gfjv-gqf2-c888","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-23T14:10:13.169141Z","id":"CVE-2026-79767","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-23T14:36:18.501Z"}}]}}}