CVE-2026-33202
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#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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
SUSE Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | — |
Debian Mixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Affected | — |
| sid | Fixed | 2:7.2.3.1+dfsg-1 |
| forky | Fixed | 2:7.2.3.1+dfsg-1 |
| bullseye | Affected | — |
| bookworm | Affected | — |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| RubyGems | activestorage | <~> 7.2.3, >= 7.2.3.1 | ~> 7.2.3, >= 7.2.3.1 |
| RubyGems | activestorage | >=8.1.0.beta1,<8.1.2.1 | 8.1.2.1 |
| RubyGems | activestorage | >=8.0.0.beta1,<8.0.4.1 | 8.0.4.1 |
| RubyGems | activestorage | <7.2.3.1 | 7.2.3.1 |
| RUBYGEMS | activestorage | < 7.2.3.1 | 7.2.3.1 |
| RUBYGEMS | activestorage | >= 8.0.0.beta1, < 8.0.4.1 | 8.0.4.1 |
| RUBYGEMS | activestorage | >= 8.1.0.beta1, < 8.1.2.1 | 8.1.2.1 |
References
- https://github.com/rails/rails/security/advisories/GHSA-73f9-jhhh-hr5m
- https://www.suse.com/security/cve/CVE-2026-33202.html
- https://nvd.nist.gov/vuln/detail/CVE-2026-33202
- 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
- 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://github.com/rubysec/ruby-advisory-db/blob/master/gems/activestorage/CVE-2026-33202.yml
- https://security-tracker.debian.org/tracker/CVE-2026-33202
- https://github.com/advisories/GHSA-73f9-jhhh-hr5m
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.