Rails Active Storage has possible glob injection in its DiskService
Priority LOW 36CWE-74Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- —
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- Partial Red Hat: 1 without a fix
Attack profile from CVSS 4.0 · CNA. Fix status from CNA, GitHub and Red Hat.
Summary
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 `DiskService#delete_prefixed` passes blob keys directly to `Dir.glob` without escaping glob metacharacters. If a blob key contains attacker-controlled input or custom-generated keys with glob metacharacters, it may be possible to delete unintended files from the storage directory. Versions 8.1.2.1, 8.0.4.1, and 7.2.3.1 contain a patch.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00672 52nd percentileScored 2026-11-07
Fix Partial activestorage (rails): 8.1.2.1, 8.0.4.1, 7.2.3.1activestorage (RubyGems): 8.1.2.1, 8.0.4.1, 7.2.3.1Red Hat: 1 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Rails | activestorage | 8.1.0.beta1 to before 8.1.2.1; 8.0.0.beta1 to before 8.0.4.1; before 7.2.3.1 | 8.1.2.1, 8.0.4.1, 7.2.3.1 | Patch available | CNA |
| — | activestorage (RubyGems) | 8.1.0.beta1 to before 8.1.2.1 | 8.1.2.1 | Patch available | GHSA-73f9-jhhh-hr5m |
| — | activestorage (RubyGems) | 8.0.0.beta1 to before 8.0.4.1 | 8.0.4.1 | Patch available | GHSA-73f9-jhhh-hr5m |
| — | activestorage (RubyGems) | before 7.2.3.1 | 7.2.3.1 | Patch available | GHSA-73f9-jhhh-hr5m |
- activestorage VendorRails Affected 8.1.0.beta1 to before 8.1.2.1; 8.0.0.beta1 to before 8.0.4.1; before 7.2.3.1 Fixed in 8.1.2.1, 8.0.4.1, 7.2.3.1 Patch available CNA
- activestorage (RubyGems) Vendor— Affected 8.1.0.beta1 to before 8.1.2.1 Fixed in 8.1.2.1 Patch available GHSA-73f9-jhhh-hr5m
- activestorage (RubyGems) Vendor— Affected 8.0.0.beta1 to before 8.0.4.1 Fixed in 8.0.4.1 Patch available GHSA-73f9-jhhh-hr5m
- activestorage (RubyGems) Vendor— Affected before 7.2.3.1 Fixed in 7.2.3.1 Patch available GHSA-73f9-jhhh-hr5m
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:* | before 7.2.3.1; 8.0.0 to before 8.0.4.1; 8.1.0 to before 8.1.2.1 | Vulnerable | Rails |
- cpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:* Versions before 7.2.3.1; 8.0.0 to before 8.0.4.1; 8.1.0 to before 8.1.2.1 Vulnerable ·Rails
Remediation
- Fix · CNA activestorage (rails) Fixed in 8.1.2.1, 8.0.4.1, 7.2.3.1
- Fix · GHSA-73f9-jhhh-hr5m activestorage (RubyGems) Fixed in 8.1.2.1 Advisory →
- Fix · GHSA-73f9-jhhh-hr5m activestorage (RubyGems) Fixed in 8.0.4.1 Advisory →
- Fix · GHSA-73f9-jhhh-hr5m activestorage (RubyGems) Fixed in 7.2.3.1 Advisory →
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat 3scale API Management Platform 2 | Affected | No fix planned: Will not fix |
Not affected: 1 product
- Red Hat 3scale API Management Platform 2
Timeline
- 2026-10-02 Threatist record created from CVE-2026-33202
- 2026-10-03 Alias added: GHSA-73f9-jhhh-hr5m
- 2026-10-08 EPSS moved to the below the 50th percentile
- 2026-10-19 EPSS moved to the 50th–90th percentile
References
Patch 3
Advisory 2
More Rails vulnerabilities
- TI-2014-00124 Directory traversal vulnerability in actionpack/lib/abstract_controller/base.rb in the… KEVCVSS 3.1HIGH 7.5
- TI-2019-03828 Path traversal in Rails https://github.com/rails/rails KEVCVSS 3.1HIGH 7.5
- TI-2016-00672 Directory traversal vulnerability in Action View in Ruby on Rails before 3.2.22.1, 4.0.x… KEVCVSS 3.1HIGH 7.5
- TI-2019-03830 Command injection in Rails https://github.com/rails/rails CVSS 3.1CRITICAL 9.8
- TI-2020-06581 Code injection in https://github.com/rails/rails CVSS 3.1HIGH 8.8
- TI-2013-00091 active_support/core_ext/hash/conversions.rb in Ruby on Rails before 2.3.15, 3.0.x before… CVSS 2.0HIGH 7.5
Sources
- CVE-2026-33202 · CVE Program
- CVE-2026-33202 · NVD
- FIRST EPSS
- GHSA-73f9-jhhh-hr5m · GitHub Advisory Database · CC BY 4.0
- CVE-2026-33202 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences