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Vulnerability record · CVE-2026-33195 · published 24 March 2026

CVE-2026-33195: Rubyonrails rails path traversal vulnerability

Rubyonrails · Rails

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.

8.0 CVSS 4.0 High EPSS 0.72% · top 47.9% CWE-22 · Path traversal
8.0CVSS 4.0 base score
0.72%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
10References
15 Jul 2026Last modified by NVD

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#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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/rails/rails/commit/4933c1e3b8c1bb04925d60347be9f69270392f2c Patch
https://github.com/rails/rails/commit/9b06fbc0f504b8afe333f33d19548f3b85fbe655 Patch
https://github.com/rails/rails/commit/a290c8a1ec189d793aa6d7f2570b6a763f675348 Patch
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 Release Notes
https://github.com/rails/rails/security/advisories/GHSA-9xrj-h377-fr87 Vendor 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

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Source: NIST National Vulnerability Database (record CVE-2026-33195), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.