CVE-2026-22860: Improper Limitation of a Pathname to a Restricted Directory

Rack is a modular Ruby web server interface. Prior to versions 2.2.22, 3.1.20, and 3.2.5, Rack::Directory’s path check used a string prefix match on the expanded path. A request like /../rootexample/ can escape the configured root if the target path starts with the root string, allowing directory...

CVE-2026-25500: Improper Neutralization of Input During Web Page Generation

Rack is a modular Ruby web server interface. Prior to versions 2.2.22, 3.1.20, and 3.2.5, Rack::Directory generates an HTML directory index where each file entry is rendered as a clickable link. If a file exists on disk whose basename starts with the javascript: scheme e.g. javascript:alert1, the...

Stored XSS in Rack::Directory via javascript: filenames rendered into anchor href

Summary Rack::Directory generates an HTML directory index where each file entry is rendered as a clickable link. If a file exists on disk whose basename begins with the javascript: scheme e.g. javascript:alert1, the generated index includes an anchor whose href attribute is exactly...

Cross-site Scripting (XSS)

Overview rack is a minimal, modular and adaptable interface for developing web applications in Ruby. By wrapping HTTP requests and responses in the simplest way possible, it unifies and distills the API for web servers, web frameworks, and software in between the so-called middleware into a singl...

GHSA-WHRJ-4476-WVMP Stored XSS in Rack::Directory via javascript: filenames rendered into anchor href

Summary Rack::Directory generates an HTML directory index where each file entry is rendered as a clickable link. If a file exists on disk whose basename begins with the javascript: scheme e.g. javascript:alert1, the generated index includes an anchor whose href attribute is exactly...

Rack has a Directory Traversal via Rack:Directory

Summary Rack::Directory’s path check used a string prefix match on the expanded path. A request like /../rootexample/ can escape the configured root if the target path starts with the root string, allowing directory listing outside the intended root. Details In directory.rb,...

Exposure of Information Through Directory Listing

Overview rack is a minimal, modular and adaptable interface for developing web applications in Ruby. By wrapping HTTP requests and responses in the simplest way possible, it unifies and distills the API for web servers, web frameworks, and software in between the so-called middleware into a singl...

GHSA-MXW3-3HH2-X2MH Rack has a Directory Traversal via Rack:Directory

Summary Rack::Directory’s path check used a string prefix match on the expanded path. A request like /../rootexample/ can escape the configured root if the target path starts with the root string, allowing directory listing outside the intended root. Details In directory.rb,...

Rack has a Directory Traversal via Rack:Directory

Summary Rack::Directory’s path check used a string prefix match on the expanded path. A request like /../rootexample/ can escape the configured root if the target path starts with the root string, allowing directory listing outside the intended root. Details In directory.rb,...

Stored XSS in Rack::Directory via javascript: filenames rendered into anchor href

Summary Rack::Directory generates an HTML directory index where each file entry is rendered as a clickable link. If a file exists on disk whose basename begins with the javascript: scheme e.g. javascript:alert1, the generated index includes an anchor whose href attribute is exactly...

Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: rubygem-rack (UTSA-2026-005348)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-005348 advisory. Rack provides an interface for developing web applications in Ruby. Prior to versions 2.2.13, 3.0.14, and 3.1.12, Rack::Static can serve files under the specified...

Unity Linux 20.1050a / 20.1060a / 20.1070a Security Update: pcs (UTSA-2026-005322)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-005322 advisory. Rack is a modular Ruby web server interface. Prior to versions 2.2.20, 3.1.18, and 3.2.3, Rack::RequestPOST reads the entire request body into memory for Content-Typ...

Unity Linux 20.1050a / 20.1060a / 20.1070a Security Update: pcs (UTSA-2026-005316)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-005316 advisory. Rack is a modular Ruby web server interface. In versions prior to 2.2.19, 3.1.17, and 3.2.2, Rack::Multipart::Parser buffers the entire multipart preamble bytes befo...

Unity Linux 20.1050a / 20.1060a / 20.1070a Security Update: pcs (UTSA-2026-005323)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-005323 advisory. Rack is a modular Ruby web server interface. Prior to versions 2.2.14, 3.0.16, and 3.1.14, Rack::QueryParser parses query strings and application/x-www-form-urlencod...

Unity Linux 20.1050a / 20.1060a / 20.1070a Security Update: pcs (UTSA-2026-005314)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-005314 advisory. Rack is a modular Ruby web server interface. In versions prior to 2.2.19, 3.1.17, and 3.2.2, Rack::Multipart::Parser stores non-file form fields parts without a...

Unity Linux 20.1050a / 20.1060a / 20.1070a Security Update: pcs (UTSA-2026-005324)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-005324 advisory. Rack is a modular Ruby web server interface. In versions prior to 2.2.19, 3.1.17, and 3.2.2, Rack::Multipart::Parser can accumulate unbounded data when a multipart...

Unity Linux 20.1050a / 20.1060a / 20.1070a Security Update: pcs (UTSA-2026-005315)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-005315 advisory. Rack is a modular Ruby web server interface. Carefully crafted Range headers can cause a server to respond with an unexpectedly large response. Responding with such...

Unity Linux 20.1050a / 20.1060a / 20.1070a Security Update: pcs (UTSA-2026-005328)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-005328 advisory. Rack is a modular Ruby web server interface. Prior to version 2.2.18, Rack::QueryParser enforces its paramslimit only for parameters separated by &, while still...

Unity Linux 20.1050a / 20.1060a / 20.1070a Security Update: pcs (UTSA-2026-005320)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-005320 advisory. Rack is a modular Ruby web server interface. Carefully crafted headers can cause header parsing in Rack to take longer than expected resulting in a possible denial o...

Unity Linux 20.1050a / 20.1060a / 20.1070a Security Update: pcs (UTSA-2026-005308)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-005308 advisory. Rack is a modular Ruby web server interface. Carefully crafted content type headers can cause Racks media type parser to take much longer than expected, leading to a...