CVE-2026-22860

HIGH7.5EPSS 0.12%

ruby-rack - security update

發布日:2026/2/17修改日:2026/3/23
也稱為:GHSA-mxw3-3hh2-x2mhCGA-66q9-cjf2-4g77DEBIAN-CVE-2026-22860DEBIAN-CVE-2026-25500DLA-4505-1

描述

## Summary `Rack::Directory`’s path check used a string prefix match on the expanded path. A request like `/../root_example/` can escape the configured root if the target path starts with the root string, allowing directory listing outside the intended root. ## Details In `directory.rb`, `File.expand_path(File.join(root, path_info)).start_with?(root)` does not enforce a path boundary. If the server root is `/var/www/root`, a path like `/var/www/root_backup` passes the check because it shares the same prefix, so `Rack::Directory` will list that directory also. ## Impact Information disclosure via directory listing outside the configured root when `Rack::Directory` is exposed to untrusted clients and a directory shares the root prefix (e.g., `public2`, `www_backup`). ## Mitigation * Update to a patched version of Rack that correctly checks the root prefix. * Don't name directories with the same prefix as one which is exposed via `Rack::Directory`.

受影響套件(4)

CVSS 分數

來源版本嚴重程度向量
osvCVSS 3.1HIGH7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

參考連結(6)