Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Rubyonrails | Rails | < 7.2.3.1 |
Related Weaknesses (CWE)
References
- https://github.com/rails/rails/releases/tag/v7.2.3.1ProductRelease Notes
- https://github.com/rails/rails/releases/tag/v8.0.4.1ProductRelease Notes
- https://github.com/rails/rails/releases/tag/v8.1.2.1ProductRelease Notes
- https://github.com/rails/rails/security/advisories/GHSA-p9fm-f462-ggrgVendor Advisory
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/activestorage/CVE-2Third Party Advisory
FAQ
What is CVE-2026-33658?
CVE-2026-33658 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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 r...
How severe is CVE-2026-33658?
CVE-2026-33658 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-33658?
Check the references section above for vendor advisories and patch information. Affected products include: Rubyonrails Rails.