{"id":"CVE-2026-50570","summary":"Fission: Incomplete capability denylist in Environment/Function PodSpec validation allows tenant-added CAP_SYS_TIME and cross-tenant node wall-clock corruption","details":"Fission is an open-source, Kubernetes-native serverless framework that simplifies the deployment of functions and applications on Kubernetes. Prior to version 1.25.0, Fission added PodSpec safety validation for tenant-facing Environment and Function CRDs (ValidatePodSpecSafety / ValidateContainerSafety admission webhook + sanitizeContainerSecurityContext executor merge layer), but the capability check was implemented as a fixed denylist of six Linux capabilities (SYS_ADMIN, NET_ADMIN, SYS_PTRACE, SYS_MODULE, DAC_READ_SEARCH, DAC_OVERRIDE). The denylist omitted CAP_SYS_TIME, among others. As a result, a tenant who could create a Function or Environment CRD could request securityContext.capabilities.add: [\"SYS_TIME\"], pass Fission's admission validation and merge-layer sanitization, and run attacker-controlled code with CAP_SYS_TIME in the resulting function or runtime container. This issue has been patched in version 1.25.0.","aliases":["GHSA-qf5v-m7p4-95rp"],"modified":"2026-08-12T03:51:19.456097894Z","published":"2026-06-10T17:34:14.910Z","database_specific":{"cwe_ids":["CWE-269","CWE-732"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/50xxx/CVE-2026-50570.json","cna_assigner":"GitHub_M"},"references":[{"type":"WEB","url":"https://github.com/fission/fission/releases/tag/v1.25.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/50xxx/CVE-2026-50570.json"},{"type":"ADVISORY","url":"https://github.com/fission/fission/security/advisories/GHSA-qf5v-m7p4-95rp"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-50570"},{"type":"FIX","url":"https://github.com/fission/fission/pull/3465"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/fission/fission","events":[{"introduced":"0"},{"fixed":"ae970aaa9bc76ec93d748bdaf03fd7523b6b6a62"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"1.25.0"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"versions":["v1.24.0","v1.23.0-rc1","v1.23.0","v1.22.0","v1.22.0-rc2","v1.22.0-rc1","v1.21.0","v1.21.0-rc2","v1.21.0-rc1","v1.20.5","v1.20.4","v1.20.3","v1.20.2","v1.20.1","v1.20.0","v1.20.0-rc2","v1.20.0-rc1","v1.19.0","v1.19.0-rc2","v1.19.0-rc1","v1.18.0","v1.18.0-rc2","v1.18.0-rc1","v1.17.0","v1.17.0-rc2","v1.16.0","v1.17.0-rc1","v1.16.0-rc2","v1.16.0-rc1","v1.15.1","v1.15.0","v1.15.0-rc2","v1.15.0-rc1","v1.14.1","1.14.1","v1.14.0","1.14.0","v1.13.1","1.13.1","v1.13.0","1.13.0","v1.8.0","1.8.0","v1.7.1","1.7.1","v1.7.0","1.7.0","v1.7.0-rc.2","1.7.0-rc.2","v1.7.0-rc.1","1.7.0-rc.1","v1.6.0","1.6.0","1.3.0","1.0-rc1","0.10.0","0.7.2","0.6.1","latest","0.6.0","0.4.1","0.4.0","0.4.0rc","0.3.0","0.3.0-rc","v0.2.1","v0.2.0-20170901","nightly20170705","nightly20170621","alpha20170124","kubecon"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-50570.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:L"}]}