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Ruby on Rails Improper Neutralization of Input During Web Page Generation (Cross-site Scripting) Vulnerability - CVE-2026-33167 - Vulnerability Database
Ruby on Rails

Ruby on Rails Improper Neutralization of Input During Web Page Generation (Cross-site Scripting) Vulnerability - CVE-2026-33167

Medium
Reference: CVE-2026-33167
NVD Link: https://nvd.nist.gov/vuln/detail/CVE-2026-33167
Title: Ruby on Rails Improper Neutralization of Input During Web Page Generation (Cross-site Scripting) Vulnerability
Overview:

Action Pack is a Rubygem for building web applications on the Rails framework. In versions on the 8.1 branch prior to 8.1.2.1 the debug exceptions page does not properly escape exception messages. A carefully crafted exception message could inject arbitrary HTML and JavaScript into the page leading to XSS. This affects applications with detailed exception pages enabled (config.consider_all_requests_local true) which is the default in development. Version 8.1.2.1 contains a patch.