En bref
- CVE-2026-33195 est une vulnérabilité CRITIQUE (CVSS 9.8) touchant activestorage, rails (rubyonrails).
- Probabilité d'exploitation dans les 30 prochains jours (EPSS) : 0.58%, plus élevée que 47.6% des vulnérabilités.
- Correctif : mettre à jour vers 8.0.4.1, 8.1.2.1, 7.2.3.1 ou plus récent.
| Package | Affected versions | Patched versions |
|---|
| activestorage RubyGems | ≥ 8.0.0.beta1, < 8.0.4.1≥ 8.1.0.beta1, < 8.1.2.1< 7.2.3.1
| 8.0.4.18.1.2.17.2.3.1
|
| rails | ≥ 8.0.0, < 8.0.4.1≥ 8.1.0, < 8.1.2.1< 7.2.3.1
| 8.0.4.18.1.2.17.2.3.1
|
Description
Impact
Active Storage's DiskService#path_for does not validate that the resolved filesystem path remains within the storage root directory. If a blob key containing path traversal sequences (e.g. ../) is used, it could allow reading, writing, or deleting arbitrary files on the server. Blob keys are expected to be trusted strings, but some applications could be passing user input as keys and would be affected.
Releases
The fixed releases are available at the normal locations.
Credit
This issue was responsibly reported by Hackerone researcher ksw9722.
NVD 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 `DiskService#path_for` does not validate that the resolved filesystem path remains within the storage root directory. If a blob key containing path traversal sequences (e.g. `../`) is used, it could allow reading, writing, or deleting arbitrary files on the server. Blob keys are expected to be trusted strings, but some applications could be passing user input as keys and would be affected. Versions 8.1.2.1, 8.0.4.1, and 7.2.3.1 contain a patch.
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