{"id":"CVE-2026-50566","aliases":["GHSA-m63v-2g9w-2w6v","GO-2026-5857"],"url":"https://o3.security/vulnerability/CVE-2026-50566","summary":"Fission: Environment Runtime.Container and Builder.Container SecurityContext bypass allows privileged pod creation","details":"Fission is an open-source, Kubernetes-native serverless framework that simplifies the deployment of functions and applications on Kubernetes. Prior to version 1.24.0, a tenant with environments.fission.io create/update RBAC can run privileged / allowPrivilegeEscalation / dangerous-capability containers in the Fission function or builder namespace, scheduled under the executor's high-privilege service account — enabling container-sandbox escape, host filesystem and network access, and potential node- and cluster-level compromise. This issue has been patched in version 1.24.0.","published":"2026-06-10T17:29:35.349Z","modified":"2026-08-12T03:51:38.983811894Z","cvss":{"score":9.9,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/fission/fission","fixedVersion":"1.24.0"}],"fix":{"url":"https://github.com/fission/fission/pull/3406","label":"fission/fission#3406"},"references":[{"type":"WEB","url":"https://github.com/fission/fission/releases/tag/v1.24.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/50xxx/CVE-2026-50566.json"},{"type":"ADVISORY","url":"https://github.com/fission/fission/security/advisories/GHSA-m63v-2g9w-2w6v"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-50566"},{"type":"FIX","url":"https://github.com/fission/fission/pull/3406"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:38.983811894Z"}}