Path traversal in Ruby on Rails - CVE-2026-33195
Published: March 24, 2026
Vulnerability identifier: #VU124280
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-33195
CWE-ID: CWE-22
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform directory traversal attacks.
The vulnerability exists due to input validation error when processing directory traversal sequences in Active Storage DiskService. A remote attacker can send a specially crafted HTTP request and read, write or delete arbitrary files on the system.
Affected software
Ruby on Rails
How to mitigate CVE-2026-33195
Install updates from vendor's website.
Ruby on Rails - addressed in versions 7.2.3.1, 8.0.4.1, 8.1.2.1