Uncontrolled Memory Allocation in Ruby on Rails - CVE-2026-33174
Published: March 24, 2026
Vulnerability identifier: #VU124275
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-33174
CWE-ID: CWE-789
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Rails
Affected software:
Ruby on Rails
Ruby on Rails
Detailed vulnerability description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to ucontrolled memory allocation in Active Storage proxy mode. A remote attacker can cause a denial of service (DoS) condition on the target system.
How to mitigate CVE-2026-33174
Install updates from vendor's website.