{"schema_version":"1.3.1","id":"GO-2026-4403","modified":"2026-02-04T22:42:26Z","published":"2026-02-04T22:42:26Z","aliases":["CVE-2025-22873"],"summary":"Improper access to parent directory of root in os","details":"It was possible to improperly access the parent directory of an os.Root by opening a filename ending in \"../\". For example, Root.Open(\"../\") would open the parent directory of the Root. This escape only permits opening the parent directory itself, not ancestors of the parent or files contained within the parent.","affected":[{"package":{"name":"stdlib","ecosystem":"Go"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.23.9"},{"introduced":"1.24.0-0"},{"fixed":"1.24.3"}]}],"ecosystem_specific":{"imports":[{"path":"os","symbols":["checkPathEscapesInternal","doInRoot","splitPathInRoot"]}]}}],"references":[{"type":"FIX","url":"https://go.dev/cl/670036"},{"type":"REPORT","url":"https://go.dev/issue/73555"},{"type":"WEB","url":"https://groups.google.com/g/golang-announce/c/UZoIkUT367A/m/5WDxKizJAQAJ"}],"credits":[{"name":"Dan Sebastian Thrane of SDU eScience Center"}],"database_specific":{"url":"https://pkg.go.dev/vuln/GO-2026-4403","review_status":"REVIEWED"}}