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CVE-2026-33658

Published: Mar 26, 2026

Modified: Mar 30, 2026

PUBLISHED

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.

Vendor	Product	Versions
rails	activestorage	affected `>= 8.1.0, < 8.1.2.1` affected `>= 8.0.0, < 8.0.4.1` affected `< 7.2.3.1`

Weaknesses (CWE)

References

https://github.com/rails/rails/security/advisories/GHSA-p9fm-f462-ggrg

x_refsource_CONFIRM

https://github.com/rails/rails/releases/tag/v7.2.3.1

x_refsource_MISC

https://github.com/rails/rails/releases/tag/v8.0.4.1

x_refsource_MISC

https://github.com/rails/rails/releases/tag/v8.1.2.1

x_refsource_MISC

https://github.com/rubysec/ruby-advisory-db/blob/master/gems/activestorage/CVE-2026-33658.yml

x_refsource_MISC

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