Medium severity6.5NVD Advisory· Published Mar 26, 2026· Updated Apr 30, 2026
CVE-2026-33658
CVE-2026-33658
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
activestorageRubyGems | >= 8.1.0, < 8.1.2.1 | 8.1.2.1 |
activestorageRubyGems | >= 8.0.0, < 8.0.4.1 | 8.0.4.1 |
activestorageRubyGems | < 7.2.3.1 | 7.2.3.1 |
Affected products
7- osv-coords6 versionspkg:apk/chainguard/gitlab-rails-ce-18.10pkg:apk/chainguard/gitlab-rails-ce-fips-18.10pkg:apk/chainguard/gitlab-rails-ce-fips-18.9pkg:apk/chainguard/ruby3.4-rails-8.0pkg:apk/wolfi/ruby3.4-rails-8.0pkg:gem/activestorage
< 18.10.3-r1+ 5 more
- (no CPE)range: < 18.10.3-r1
- (no CPE)range: < 18.10.3-r0
- (no CPE)range: < 18.9.5-r0
- (no CPE)range: < 8.0.5-r0
- (no CPE)range: < 8.0.5-r0
- (no CPE)range: >= 8.1.0, < 8.1.2.1
Patches
Vulnerability mechanics
References
7- github.com/advisories/GHSA-p9fm-f462-ggrgghsaADVISORY
- github.com/rails/rails/security/advisories/GHSA-p9fm-f462-ggrgnvdVendor AdvisoryWEB
- github.com/rubysec/ruby-advisory-db/blob/master/gems/activestorage/CVE-2026-33658.ymlnvdThird Party AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2026-33658ghsaADVISORY
- github.com/rails/rails/releases/tag/v7.2.3.1nvdProductRelease NotesWEB
- github.com/rails/rails/releases/tag/v8.0.4.1nvdProductRelease NotesWEB
- github.com/rails/rails/releases/tag/v8.1.2.1nvdProductRelease NotesWEB
News mentions
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