Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2026-33174

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, when serving files through Active Storage's proxy delivery mode, the proxy controller loads the entire requested byte range into memory before sending it. A request with a large or unbounded Range header (e.g. `bytes=0-`) could cause the server to allocate memory proportional to the file size, possibly resulting in a DoS vulnerability through memory exhaustion. Versions 8.1.2.1, 8.0.4.1, and 7.2.3.1 contain a patch.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 3.7%
CVSS Severity
CVSS v3 Score 7.5
Products affected by CVE-2026-33174


Contact Us

Shodan ® - All rights reserved