Description
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 Active Storage's proxy controller does not limit the number of byte ranges in an HTTP Range header. A request with thousands of small ranges causes disproportionate CPU usage compared to a normal request for the same file, possibly resulting in a DoS vulnerability. Versions 8.1.2.1, 8.0.4.1, and 7.2.3.1 contain a patch.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
rails activestorage
>= 8.1.0, < 8.1.2.1affected>= 8.0.0, < 8.0.4.1affected< 7.2.3.1affected
References
- https://github.com/rails/rails/security/advisories/GHSA-p9fm-f462-ggrg ↗
- https://github.com/rails/rails/releases/tag/v7.2.3.1 ↗
- https://github.com/rails/rails/releases/tag/v8.0.4.1 ↗
- https://github.com/rails/rails/releases/tag/v8.1.2.1 ↗
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/activestorage/CVE-2026-33658.yml ↗