{"cve":"CVE-2026-50567","nvd":{"published":"2026-06-10T18:17:13.197","modified":"2026-06-17T10:57:43.153","status":"Deferred","description":"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/<ns>/ directories, into mounted secret/config volumes, or into the fetcher's own binary. This issue has been patched in version 1.25.0.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N","score":7.7},"cwes":["CWE-22"],"references":["https://github.com/fission/fission/pull/3444","https://github.com/fission/fission/releases/tag/v1.25.0","https://github.com/fission/fission/security/advisories/GHSA-q6vm-xqc9-v3ff"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:38:48.522727527+00:00"},"epss":{"cve":"CVE-2026-50567","score":0.00301,"percentile":0.22845,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-q6vm-xqc9-v3ff","url":"https://osv.dev/vulnerability/GHSA-q6vm-xqc9-v3ff","summary":" Fission: Zip Slip in pkg/utils/zip.go:Unarchive allows fetcher to write outside the destination directory","modified":"2026-08-18T15:11:00.731717279Z","packages":[{"ecosystem":"Go","name":"github.com/fission/fission","purl":"pkg:golang/github.com/fission/fission","ranges":["<1.25.0"],"fixed":["1.25.0"]}]},{"id":"GO-2026-6127","url":"https://osv.dev/vulnerability/GO-2026-6127","summary":"Fission: Zip Slip in pkg/utils/zip.go:Unarchive allows fetcher to write outside the destination directory in github.com/fission/fission","modified":"2026-08-18T15:00:21.381257551Z","packages":[{"ecosystem":"Go","name":"github.com/fission/fission","purl":"pkg:golang/github.com/fission/fission","ranges":["<1.25.0"],"fixed":["1.25.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}