Rails Active Storage has a possible DoS vulnerability when in proxy mode via Range requests

CAO 7.5CVE-2026-33174 · GHSA-r46p-8f7g-vvvg · Công bố 24/03/2026 · cập nhật 17/06/2026

Gói / sản phẩm	Phiên bản bị ảnh hưởng	Phiên bản đã vá
activestorage RubyGems	`≥ 8.0.0.beta1, < 8.0.4.1≥ 8.1.0.beta1, < 8.1.2.1< 7.2.3.1`	`8.0.4.18.1.2.17.2.3.1`
rails rubyonrails	`≥ 8.0.0, < 8.0.4.1≥ 8.1.0, < 8.1.2.1< 7.2.3.1`	`8.0.4.18.1.2.17.2.3.1`

Mô tả

Impact

When serving files through Active Storage's Blobs::ProxyController, the controller loads the entire requested byte range into memory before sending it. A request with a large or unbounded Range header (e.g. bytes=0-) could cause the server to allocate memory proportional to the file size, possibly resulting in a DoS vulnerability through memory exhaustion.

Releases

The fixed releases are available at the normal locations.

Credit

This issue was responsibly reported by Hackerone user pirikara

Mô tả của NVD

Active Storage allows users to attach cloud and local files in Rails applications. Prior to versions 8.1.2.1, 8.0.4.1, and 7.2.3.1, when serving files through Active Storage's proxy delivery mode, the proxy controller loads the entire requested byte range into memory before sending it. A request with a large or unbounded Range header (e.g. `bytes=0-`) could cause the server to allocate memory proportional to the file size, possibly resulting in a DoS vulnerability through memory exhaustion. Versions 8.1.2.1, 8.0.4.1, and 7.2.3.1 contain a patch.