{"id":"CVE-2026-50567","summary":"Fission: Zip Slip in pkg/utils/zip.go:Unarchive allows fetcher to write outside the destination directory","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, Unarchive in pkg/utils/zip.go joined each archive entry name with the destination directory via filepath.Join and wrote the result without checking whether the resolved path stayed under the destination. A zip entry named ../../tmp/evil therefore landed at /tmp/evil. An attacker who could control a Package.Spec.Source.URL or Deployment.URL archive could induce the fetcher (running as the per-environment pod's fission-fetcher sidecar) to write files anywhere that process could reach: into other tenants' /packages/\u003cns\u003e/ directories, into mounted secret/config volumes, or into the fetcher's own binary. This issue has been patched in version 1.25.0.","aliases":["GHSA-q6vm-xqc9-v3ff","GO-2026-6127"],"modified":"2026-09-09T18:26:42.670265529Z","published":"2026-06-10T17:30:45.695Z","related":["openSUSE-SU-2026:21761-1"],"database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-22"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/50xxx/CVE-2026-50567.json"},"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-2026-50567.json"},{"type":"ADVISORY","url":"https://github.com/fission/fission/security/advisories/GHSA-q6vm-xqc9-v3ff"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-50567"},{"type":"FIX","url":"https://github.com/fission/fission/pull/3444"}],"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-2026-50567.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:N"}]}