2270 matches found
Rack has a root directory disclosure via unescaped regex interpolation in Rack::Directory
Summary Rack::Directory interpolates the configured root path directly into a regular expression when deriving the displayed directory path. If root contains regex metacharacters such as +, , or ., the prefix stripping can fail and the generated directory listing may expose the full filesystem pa...
EUVD-2026-18378
Rack has quadratic complexity in Rack::Utils.selectbestencoding via wildcard Accept-Encoding header...
GHSA-V569-HP3G-36WR Rack has quadratic complexity in Rack::Utils.select_best_encoding via wildcard Accept-Encoding header
Summary Rack::Utils.selectbestencoding processes Accept-Encoding values with quadratic time complexity when the header contains many wildcard entries. Because this method is used by Rack::Deflater to choose a response encoding, an unauthenticated attacker can send a single request with a crafted...
Rack has quadratic complexity in Rack::Utils.select_best_encoding via wildcard Accept-Encoding header
Summary Rack::Utils.selectbestencoding processes Accept-Encoding values with quadratic time complexity when the header contains many wildcard entries. Because this method is used by Rack::Deflater to choose a response encoding, an unauthenticated attacker can send a single request with a crafted...
EUVD-2026-18423
Rack: Forwarded Header semicolon injection enables Host and Scheme spoofing...
Rack: Forwarded Header semicolon injection enables Host and Scheme spoofing
Summary Rack::Utils.forwardedvalues parses the RFC 7239 Forwarded header by splitting on semicolons before handling quoted-string values. Because quoted values may legally contain semicolons, a header such as: http Forwarded: for="127.0.0.1;host=evil.com;proto=https" can be interpreted by Rack as...
GHSA-RX22-G9MX-QRHV Rack's improper unfolding of folded multipart headers preserves CRLF in parsed parameter values
Summary Rack::Multipart::Parser unfolds folded multipart part headers incorrectly. When a multipart header contains an obs-fold sequence, Rack preserves the embedded CRLF in parsed parameter values such as filename or name instead of removing the folded line break during unfolding. As a result,...
EUVD-2026-18417
Rack's improper unfolding of folded multipart headers preserves CRLF in parsed parameter values...
EUVD-2026-18368
Rack's greedy multipart boundary parsing can cause parser differentials and WAF bypass...
GHSA-VGPV-F759-9WX3 Rack's greedy multipart boundary parsing can cause parser differentials and WAF bypass.
Summary Rack::Multipart::Parser extracts the boundary parameter from multipart/form-data using a greedy regular expression. When a Content-Type header contains multiple boundary parameters, Rack selects the last one rather than the first. In deployments where an upstream proxy, WAF, or intermedia...
Rack's greedy multipart boundary parsing can cause parser differentials and WAF bypass.
Summary Rack::Multipart::Parser extracts the boundary parameter from multipart/form-data using a greedy regular expression. When a Content-Type header contains multiple boundary parameters, Rack selects the last one rather than the first. In deployments where an upstream proxy, WAF, or intermedia...
Interpretation Conflict
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...
EUVD-2026-18474
Rack's multipart header parsing allows Denial of Service via escape-heavy quoted parameters...
GHSA-V6X5-CG8R-VV6X Rack's multipart header parsing allows Denial of Service via escape-heavy quoted parameters
Summary Rack::Multipart::Parserhandlemimehead parses quoted multipart parameters such as Content-Disposition: form-data; name="..." using repeated Stringindex searches combined with Stringslice! prefix deletion. For escape-heavy quoted values, this causes super-linear processing. An unauthenticat...
Rack's multipart header parsing allows Denial of Service via escape-heavy quoted parameters
Summary Rack::Multipart::Parserhandlemimehead parses quoted multipart parameters such as Content-Disposition: form-data; name="..." using repeated Stringindex searches combined with Stringslice! prefix deletion. For escape-heavy quoted values, this causes super-linear processing. An unauthenticat...
GHSA-X8CG-FQ8G-MXFX Rack's multipart byte range processing allows denial of service via excessive overlapping ranges
Summary Rack::Utils.getbyteranges parses the HTTP Range header without limiting the number of individual byte ranges. Although the existing fix for CVE-2024-26141 rejects ranges whose total byte coverage exceeds the file size, it does not restrict the count of ranges. An attacker can supply many...
EUVD-2026-18386
Rack's multipart byte range processing allows denial of service via excessive overlapping ranges...
GHSA-Q4QF-9J86-F5MH Rack:: Static header_rules bypass via URL-encoded paths
Summary Rack::Staticapplicablerules evaluates several headerrules types against the raw URL-encoded PATHINFO, while the underlying file-serving path is decoded before the file is served. As a result, a request for a URL-encoded variant of a static path can serve the same file without the headers...
EUVD-2026-18384
Rack:: Static headerrules bypass via URL-encoded paths...
Rack:: Static header_rules bypass via URL-encoded paths
Summary Rack::Staticapplicablerules evaluates several headerrules types against the raw URL-encoded PATHINFO, while the underlying file-serving path is decoded before the file is served. As a result, a request for a URL-encoded variant of a static path can serve the same file without the headers...