CVE-2026-33658: Rails Active Storage has a possible DoS vulnerability in proxy mode via multi-range requests

CVE-2026-33658 · Severity: low · CVSS 3.1 · Published 2026-03-25

Rails Active Storage has a possible DoS vulnerability in proxy mode via multi-range requests

Technologies: activestorage (RubyGems). Vendors: RubyGems.

Quick answers

Is CVE-2026-33658 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-33658 being exploited in the wild.
How severe is CVE-2026-33658?
Low severity, with a CVSS score of 3.1, published 25 March 2026.
Which products and versions are affected?
activestorage (RubyGems) ECOSYSTEM:introduced=8.1.0,fixed=8.1.2.1.
Is there a fix for CVE-2026-33658?
Yes. activestorage (RubyGems): upgrade to 8.1.2.1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2026-33658?
Check whether you run activestorage (RubyGems) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • activestorage (RubyGems): upgrade to 8.1.2.1 or later
    bundle update activestorage

Affected products

  • activestorage (RubyGems) ECOSYSTEM:introduced=8.1.0,fixed=8.1.2.1

Identifiers

  • CVE-2026-33658
  • GHSA-p9fm-f462-ggrg

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