{"cve":{"cve_id":"CVE-2026-50568","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":0.00114,"epss_percentile":0.01781,"epss_as_of":"2026-06-23","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, SanitizeFilePath in pkg/utils/utils.go validated that a path stayed under a safe directory by calling strings.HasPrefix(path, safedir). This is a lexical check, not a directory boundary check: /packages-extra/evil starts with /packages, so it passed. The function did not enforce a path-separator boundary, so any sibling directory whose name began with the safe-directory string was accepted. Callers included the builder's Clean handler (pkg/builder/builder.go:208) and the fetcher's Fetch / Upload handlers (pkg/fetcher/fetcher.go). A tenant who could pre-create or control a sibling directory under the fetcher / builder's shared volume could induce a write or read outside the intended safe directory. This issue has been patched in version 1.25.0.","published_at":"2026-06-10T17:31:49.917000Z","last_modified_at":null,"cvss_v3_score":3.6,"cvss_v3_vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N","cvss_v3_severity":"LOW","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":["CWE-41"],"nvd_references":["https://github.com/fission/fission/security/advisories/GHSA-r5jh-q2mw-gcx4","https://github.com/fission/fission/pull/3445","https://github.com/fission/fission/pull/3446","https://github.com/fission/fission/releases/tag/v1.25.0"],"vuln_status":null,"trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-24T00:09:39.878444Z","updated_at":"2026-06-28T23:30:47.822556Z"},"effective_severity":"LOW","badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"L","value_label":"Local"},{"metric":"AC","name":"Attack Complexity","value":"H","value_label":"High"},{"metric":"PR","name":"Privileges Required","value":"L","value_label":"Low"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"U","value_label":"Unchanged"},{"metric":"C","name":"Confidentiality","value":"L","value_label":"Low"},{"metric":"I","name":"Integrity","value":"L","value_label":"Low"},{"metric":"A","name":"Availability","value":"N","value_label":"None"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"fission","vendor_name":"fission","product_slug":"fission","product_name":"fission","version_start":"< 1.25.0","version_start_inclusive":true,"version_end":"< 1.25.0","version_end_inclusive":true,"cpe23_uri":"cve5:fission:fission:< 1.25.0:< 1.25.0"}],"exploit_refs":[],"news":[],"references":[{"url":"https://github.com/fission/fission/security/advisories/GHSA-r5jh-q2mw-gcx4","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://github.com/fission/fission/pull/3445","source_type":"PATCH","tags":["patch"]},{"url":"https://github.com/fission/fission/pull/3446","source_type":"PATCH","tags":["patch"]},{"url":"https://github.com/fission/fission/releases/tag/v1.25.0","source_type":"PATCH","tags":["patch"]}],"timeline":[{"type":"published","at":"2026-06-10T17:31:49.917000Z","label":"CVE published","source":null},{"type":"cvss_changed","at":"2026-06-28T17:55:22.518073Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:55:22.518073Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:55:22.518073Z","label":"CVSS score revised","source":"cvelistv5"}]}