CVSS 4.0
2.3 lowCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:UCVE-2026-33658
Low (2.3) in rubyonrails rails. EPSS 0.5% chance of exploitation in the next 30 days. Fixed in activestorage 7.2.3.1, 8.0.4.1, 8.1.2.1.
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.
Severity
CVSS 3.1
6.5 mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H- EPSS
- 0.5% chance of exploitation in the next 30 days; higher than 39% of CVEs (scores of 2026-10-31)
- CWE
- CWE-770
- Published
- Modified
- Record from
- the NVD, synced
Affected
- rubyonrails:rails
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-p9fm-f462-ggrg | RubyGems | activestorage | >=8.1.0 <8.1.2.1 | 8.1.2.1 |
| GHSA-p9fm-f462-ggrg | RubyGems | activestorage | >=8.0.0 <8.0.4.1 | 8.0.4.1 |
| GHSA-p9fm-f462-ggrg | RubyGems | activestorage | <7.2.3.1 | 7.2.3.1 |
References
- 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/rails/rails/security/advisories/GHSA-p9fm-f462-ggrg
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/activestorage/CVE-2026-33658.yml