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.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2026-33195)

Note that Nessus relies on the presence of the package as reported by the vendor.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - 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. (CVE-2026-33195)

ID	Name	Product	Family	Severity
303636	Linux Distros Unpatched Vulnerability : CVE-2026-33195	Nessus	Misc.	critical
439111	SCA: security update for activestorage (GHSA-9xrj-h377-fr87)	Tenable Cloud Security	SCA Checks	critical
439111	SCA: security update for activestorage (GHSA-9xrj-h377-fr87)	Tenable Self-Hosted Container Security	SCA Checks	critical

Detections

Analytics

CVE-2026-33195

critical

Tenable Plugins

critical

critical

critical