Critical severity · published Mar 23, 2026
CVE-2026-33202
Rails Active Storage has possible glob injection in its DiskService
9.1
CVSS
0.7%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 52% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AC
activestorage · rails
>= 8.1.0.beta1, < 8.1.2.1; >= 8.0.0.beta1, < 8.0.4.1; < 7.2.3.1 · source: vendor
RA
Rails · Rubyonrails
before 7.2.3.1; 8.0.0 before 8.0.4.1; 8.1.0 before 8.1.2.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-33202
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-33202
Patch
https://github.com/rails/rails/commit/8c9676b803820110548cdb7523800db43bc6874c
Patch
https://github.com/rails/rails/commit/955284d26e469a9c026a4eee5b21f0414ab0bccf
Patch
https://github.com/rails/rails/commit/fa19073546360856e9f4dab221fc2c5d73a45e82
Release Notes
https://github.com/rails/rails/releases/tag/v7.2.3.1
Release Notes
https://github.com/rails/rails/releases/tag/v8.0.4.1
Release Notes
https://github.com/rails/rails/releases/tag/v8.1.2.1
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