Rubyonrails Rails — CVE-2026-33202 (Critical)

Date Mar 24, 2026

Type Vendor advisory

Signal Critical vendor advisory

Vendor / Product Rubyonrails · Rails

CVE CVE-2026-33202

Critical vendor advisory CVE-2026-33202

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, 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.

Why it matters

This CVE carries a CRITICAL severity rating (CVSS 9.1) in Rubyonrails Rails. Patch or mitigate promptly.

Operator check

Review CVE-2026-33202 in your asset inventory. Apply patches per vendor guidance and verify Rails is not exposed. CVSS score: 9.1.

Sources

NVD — CVE-2026-33202 Vendor reference Vendor reference

PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.

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