Expired pointer dereference in Ruby on Rails - CVE-2026-33173
Published: March 24, 2026
Vulnerability identifier: #VU124273
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-33173
CWE-ID: CWE-825
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to gain access to sensitive information.
The vulnerability exists due to DirectUploadsController accepts arbitrary metadata from the client and persists it on the blob. A remote attacker can gain access to sensitive information on the target system.
Affected software
Ruby on Rails
How to mitigate CVE-2026-33173
Install updates from vendor's website.
Ruby on Rails - addressed in versions 7.2.3.1, 8.0.4.1, 8.1.2.1