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CVE

CVE-2026-33195

Rails Active Storage has possible Path Traversal in DiskService
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CVE

CVE-2026-33195

Rails Active Storage has possible Path Traversal in DiskService

Impact

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.

Releases

The fixed releases are available at the normal locations.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
8
-
4.0
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:X/V:X/RE:X/U:X
C
H
U
0
-
C
H
U
-

Related Resources

No items found.

References

https://github.com/rails/rails/security/advisories/GHSA-9xrj-h377-fr87, https://github.com/rails/rails/commit/4933c1e3b8c1bb04925d60347be9f69270392f2c, https://github.com/rails/rails/commit/9b06fbc0f504b8afe333f33d19548f3b85fbe655, https://github.com/rails/rails/commit/a290c8a1ec189d793aa6d7f2570b6a763f675348, https://github.com/rails/rails, https://github.com/rails/rails/releases/tag/v7.2.3.1, https://github.com/rails/rails/releases/tag/v8.0.4.1, https://github.com/rails/rails/releases/tag/v8.1.2.1

Severity

9.8

CVSS Score
0
10

Basic Information

Ecosystem
Base CVSS
9.8
EPSS Probability
0%
EPSS Percentile
0%
Introduced Version
8.1.0.beta1,8.0.0.beta1,0
Fix Available
8.1.2.1,8.0.4.1,7.2.3.1

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