CVE-2026-34230 Rack: Quadratic complexity in Rack::Utils.select_best_encoding via wildcard Accept-Encoding header

Rack is a modular Ruby web server interface. Prior to versions 2.2.23, 3.1.21, and 3.2.6, 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 respon...

CVE-2026-34230

Rack is a modular Ruby web server interface. Prior to versions 2.2.23, 3.1.21, and 3.2.6, 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 respon...

PT-2026-29808

Name of the Vulnerable Software and Affected Versions Rack versions prior to 2.2.23, 3.1.21, and 3.2.6 Description Rack’s Rack::Multipart::Parser uses a greedy regular expression to extract the boundary parameter from multipart/form-data. When a Content-Type header contains multiple boundary...

CVE-2026-32762: Interpretation Conflict

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::Utils.forwardedvalues parses the RFC 7239 Forwarded header by splitting on semicolons before handling quoted-string values. Because quoted values may legally contain semicolons...

PT-2026-29818

Name of the Vulnerable Software and Affected Versions Rack versions prior to 2.2.23, 3.1.21, and 3.2.6 Description Rack’s Rack::Sendfilemap accel path function directly uses the X-Accel-Mapping request header value in a regular expression for rewriting file paths used with X-Accel-Redirect. Becau...

PT-2026-29817

Name of the Vulnerable Software and Affected Versions Rack versions prior to 2.2.23, 3.1.21, and 3.2.6 Description Rack's Rack::Multipart::Parser does not limit the size of multipart uploads when a Content-Length header is not present, such as with HTTP chunked transfer encoding. Specifically, wh...

PT-2026-29841

Name of the Vulnerable Software and Affected Versions Rack versions 3.2.0 through 3.2.5 Description Rack’s Rack::Multipart::Parser incorrectly unfolds folded multipart part headers. When a multipart header contains an obs-fold sequence, Rack preserves the embedded CRLF in parsed parameter values...

PT-2026-29856

Name of the Vulnerable Software and Affected Versions Rack versions 3.0.0.beta1 through 3.1.21 and versions 3.2.0 through 3.2.6 Description Rack’s Rack::Multipart::Parserhandle mime head function parses quoted multipart parameters using repeated Stringindex searches and Stringslice! operations...

Rack 安全漏洞

Rack is a modular Ruby web server interface developed by Rack authors. Vulnerabilities exist in versions of Rack prior to 2.2.23, 3.1.21, and 3.2.6. These vulnerabilities stem from Rack::Staticapplicablerules’ evaluation of header rules for PATHINFO when the original URL is encoded. The underlyin...

PT-2026-29844

Name of the Vulnerable Software and Affected Versions Rack versions 3.0.0.beta1 through 3.1.20 and 3.2.0 through 3.2.5 Description The Rack web server interface is susceptible to a header parsing issue within Rack::Utils.forwarded values. The component incorrectly parses the RFC 7239 Forwarded...

Rack 安全漏洞

Rack is a modular Ruby web server interface developed by Rack authors. Vulnerabilities exist in versions of Rack prior to 2.2.23, 3.1.21, and 3.2.6. These vulnerabilities stem from Rack::Utils.getbyteranges, which does not limit the number of individual byte ranges when parsing HTTP Range headers...

PT-2026-29919

Summary Rack::Staticapplicable rules evaluates several header rules types against the raw URL-encoded PATH INFO, 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 heade...

PT-2026-29923

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,...

Rack 安全漏洞

Rack is a modular Ruby web server interface developed by Rack authors. Vulnerabilities exist in versions of Rack prior to 2.2.23, 3.1.21, and 3.2.6. These vulnerabilities stem from Rack::Sendfilemapaccelpath directly inserting the values of the X-Accel-Mapping request header into regular...

Rack 安全漏洞

Rack is a modular Ruby web server interface developed by Rack authors. There were security vulnerabilities in versions of Rack from 3.0.0.beta1 to 3.1.21, as well as in versions from 3.2.0 to 3.2.6. These vulnerabilities stemmed from improper parsing of forwarded headers, which could lead to...

Rack 安全漏洞

Rack is a modular Ruby web server interface developed by Rack authors. Vulnerabilities exist in versions of Rack prior to 2.2.23, 3.1.21, and 3.2.6. These vulnerabilities stem from Rack::Multipart::Parser, which handles multipart requests without a limit on the total size, potentially leading to...

Rack 注入漏洞

Rack is a modular Ruby web server interface developed by the Rack open-source project. Versions of Rack from 3.2.0 to 3.2.6 contained an injection vulnerability. This vulnerability stemmed from an error in the multi-part resolver that improperly expanded and folded headers, which could lead to HT...

Rack 安全漏洞

Rack is a modular Ruby web server interface developed by the Rack open-source project. Versions of Rack prior to 2.2.23, 3.1.21, and 3.2.6 contained security vulnerabilities. These vulnerabilities stemmed from Rack::Directory allowing the root path of configuration settings to be directly inserte...

PT-2026-29810

Name of the Vulnerable Software and Affected Versions Rack versions prior to 2.2.23, 3.1.21, and 3.2.6 Description Rack::Directory interpolates the configured root path directly into a regular expression when deriving the displayed directory path. If the root path contains regex metacharacters su...

PT-2026-29815

Name of the Vulnerable Software and Affected Versions Rack versions prior to 2.2.23, 3.1.21, and 3.2.6 Description The Rack::Utils.get byte ranges function parses the HTTP Range header without limiting the number of individual byte ranges. While a previous fix for CVE-2024-26141 prevents ranges...