{"cve":{"cve_id":"CVE-2026-25121","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":0.00369,"epss_percentile":0.28555,"epss_as_of":"2026-06-23","description":"apko allows users to build and publish OCI container images built from apk packages. From version 0.14.8 to before 1.1.1, a path traversal vulnerability was discovered in apko's dirFS filesystem abstraction. An attacker who can supply a malicious APK package (e.g., via a compromised or typosquatted repository) could create directories or symlinks outside the intended installation root. The MkdirAll, Mkdir, and Symlink methods in pkg/apk/fs/rwosfs.go use filepath.Join() without validating that the resulting path stays within the base directory. This issue has been patched in version 1.1.1.","published_at":"2026-02-04T19:02:17.979000Z","last_modified_at":null,"cvss_v3_score":7.5,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","cvss_v3_severity":"HIGH","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-23"],"nvd_references":["https://github.com/chainguard-dev/apko/security/advisories/GHSA-5g94-c2wx-8pxw","https://github.com/chainguard-dev/apko/commit/d8b7887a968a527791b3c591ae83928cb49a9f14"],"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":"2026-06-28T23:29:23.615645Z"},"effective_severity":"HIGH","badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"N","value_label":"Network"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"U","value_label":"Unchanged"},{"metric":"C","name":"Confidentiality","value":"N","value_label":"None"},{"metric":"I","name":"Integrity","value":"H","value_label":"High"},{"metric":"A","name":"Availability","value":"N","value_label":"None"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"chainguard-dev","vendor_name":"chainguard-dev","product_slug":"apko","product_name":"apko","version_start":">= 0.14.8, < 1.1.1","version_start_inclusive":true,"version_end":">= 0.14.8, < 1.1.1","version_end_inclusive":true,"cpe23_uri":"cve5:chainguard-dev:apko:>= 0.14.8, < 1.1.1:>= 0.14.8, < 1.1.1"}],"exploit_refs":[],"news":[],"references":[{"url":"https://github.com/chainguard-dev/apko/security/advisories/GHSA-5g94-c2wx-8pxw","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://github.com/chainguard-dev/apko/commit/d8b7887a968a527791b3c591ae83928cb49a9f14","source_type":"PATCH","tags":["patch"]}],"timeline":[{"type":"published","at":"2026-02-04T19:02:17.979000Z","label":"CVE published","source":null},{"type":"cvss_changed","at":"2026-06-28T17:52:05.081614Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:52:05.081614Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:52:05.081614Z","label":"CVSS score revised","source":"cvelistv5"}]}