User Impersonation

Overview puma is a simple, fast, threaded, and highly concurrent HTTP 1.1 server for Ruby/Rack applications. Puma is intended for use in both development and production environments. It's great for highly concurrent Ruby implementations such as Rubinius and JRuby as well as as providing process...

CVE-2026-34835

Rack is a modular Ruby web server interface. From versions 3.0.0.beta1 to before 3.1.21, and 3.2.0 to before 3.2.6, Rack::Request parses the Host header using an AUTHORITY regular expression that accepts characters not permitted in RFC-compliant hostnames, including /, ?, , and @. Because req.hos...

Researchers Identify Rack::Static Vulnerability Enabling Data Breaches in Ruby Servers

Cybersecurity researchers have disclosed three security flaws in the Rack Ruby web server interface that, if successfully exploited, could enable attackers to gain unauthorized access to files, inject malicious data, and tamper with logs under certain conditions. The vulnerabilities, flagged by...

Information Exposure

Overview puma is a simple, fast, threaded, and highly concurrent HTTP 1.1 server for Ruby/Rack applications. Puma is intended for use in both development and production environments. It's great for highly concurrent Ruby implementations such as Rubinius and JRuby as well as as providing process...

ruby: HTTP response splitting in WEBrick

It was found that WEBrick did not sanitize headers sent back to clients, resulting in a response-splitting vulnerability. An attacker, able to control the server's headers, could force WEBrick into injecting additional headers to a client...

ruby: DoS by large request in WEBrick

It was found that WEBrick could be forced to use an excessive amount of memory during the processing of HTTP requests, leading to a Denial of Service. An attacker could use this flaw to send huge requests to a WEBrick application, resulting in the server running out of memory...

MS10-081 Heap Overflow

!/usr/bin/env ruby http://breakingpointsystems.com/community/blog/microsoft-vulnerability-proof-of-concept Nephi Johnson require 'socket' def httpsendsock, data, opts= defaults = :code="200", :message="OK", :type="text/html", :desc="content" opts = defaults.mergeopts code = opts:code message =...