critical9.1
CVE-2026-33202
Active Storage allows users to attach cloud and local files in Rails applications.
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| rubygems | activestorage | >= 8.1.0.beta1, < 8.1.2.1 | 8.1.2.1 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Rubyonrails | Rails | before 7.2.3.1 from 8.0.0 before 8.0.4.1 from 8.1.0 before 8.1.2.1 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-73f9-jhhh-hr5m
- https://github.com/rails/rails/security/advisories/GHSA-73f9-jhhh-hr5m
- https://github.com/rails/rails/commit/8c9676b803820110548cdb7523800db43bc6874c
- https://github.com/rails/rails/commit/955284d26e469a9c026a4eee5b21f0414ab0bccf
- https://github.com/rails/rails/commit/fa19073546360856e9f4dab221fc2c5d73a45e82
- https://github.com/rails/rails/releases/tag/v7.2.3.1
- https://github.com/rails/rails/releases/tag/v8.0.4.1
- https://github.com/rails/rails/releases/tag/v8.1.2.1
- https://nvd.nist.gov/vuln/detail/CVE-2026-33202
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/activestorage/CVE-2026-33202.yml