CVE-2026-33173 (GCVE-0-2026-33173)
Vulnerability from cvelistv5
Published
2026-03-23 23:21
Modified
2026-03-24 15:12
Severity ?
5.3 (Medium) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
CWE
  • CWE-925 - Improper Verification of Intent by Broadcast Receiver
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, `DirectUploadsController` accepts arbitrary metadata from the client and persists it on the blob. Because internal flags like `identified` and `analyzed` are stored in the same metadata hash, a direct-upload client can set these flags to skip MIME detection and analysis. This allows an attacker to upload arbitrary content while claiming a safe `content_type`, bypassing any validations that rely on Active Storage's automatic content type identification. Versions 8.1.2.1, 8.0.4.1, and 7.2.3.1 contain a patch.
References
Impacted products
Vendor Product Version
rails activestorage Version: >= 8.1.0.beta1, < 8.1.2.1
Version: >= 8.0.0.beta1, < 8.0.4.1
Version: < 7.2.3.1
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