CVE-2026-33195

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#path_for` does not validate that the resolved filesystem path remains within the storage root directory. If a blob key containing path traversal sequences (e.g. `../`) is used, it could allow reading, writing, or deleting arbitrary files on the server. Blob keys are expected to be trusted strings, but some applications could be passing user input as keys and would be affected. Versions 8.1.2.1, 8.0.4.1, and 7.2.3.1 contain a patch.

• CWE-22
• CWE-22

• https://github.com/rails/rails/commit/4933c1e3b8c1bb04925d60347be9f69270392f2cPatch
• https://github.com/rails/rails/commit/9b06fbc0f504b8afe333f33d19548f3b85fbe655Patch
• https://github.com/rails/rails/commit/a290c8a1ec189d793aa6d7f2570b6a763f675348Patch
• https://github.com/rails/rails/releases/tag/v7.2.3.1Release Notes
• https://github.com/rails/rails/releases/tag/v8.0.4.1Release Notes
• https://github.com/rails/rails/releases/tag/v8.1.2.1Release Notes
• https://github.com/rails/rails/security/advisories/GHSA-9xrj-h377-fr87Vendor Advisory
• https://access.redhat.com/security/cve/CVE-2026-33195
• https://bugzilla.redhat.com/show_bug.cgi?id=2450546
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33195.json

Published

Mar 24, 2026

Last Modified

Jul 15, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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