CVE-2026-33658
Medium
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.
SeverityMedium
CVSS6.5
Exploit probability—
ProductRails
PublishedMar 26, 2026
First seenMar 26, 2026
Weakness typeCWE-770Allocation of resources without limits
How to fix
Update
- rubyonrails rails7.2.3.1, 8.0.4.1, 8.1.2.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| rubyonrails rails | v < 7.2.3.1, 8.0.0 ≤ v < 8.0.4.1, 8.1.0 ≤ v < 8.1.2.1 | 7.2.3.1, 8.0.4.1, 8.1.2.1 |
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