Critical (9.8). EPSS 5.4% chance of exploitation in the next 30 days. Fixed in actionpack-page_caching 1.2.1.
There is a vulnerability in actionpack_page-caching gem < v1.2.1 that allows an attacker to write arbitrary files to a web server, potentially resulting in remote code execution if the attacker can write unescaped ERB to a view.
Severity
CVSS 3.1
9.8 critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
5.4% chance of exploitation in the next 30 days; higher than 92% of CVEs (scores of 2026-10-31)