Sourced from sinatra's changelog.

4.1.1 / 2024-11-20

• Fix: Restore WEBrick support (#2067)

4.1.0 / 2024-11-18

• New: Add host_authorization setting (#2053)
  • Defaults to .localhost, .test and any IP address in development mode.
  • Security: addresses CVE-2024-21510.
• Fix: Return an instance of Sinatra::IndifferentHash when calling #except (#2044)
• Fix: Address warning from URI for Ruby 3.4 (#2060)
• Fix: rackup no longer depends on WEBrick, recommend Puma instead (4a558503)
• Fix: Zeitwerk 2.7.0+ compatibility (#2050)
• Fix: Address warning about Hash construction for Ruby 3.4 (#2028)
• Fix: Declare missing dependencies for Ruby 3.5 (#2032)
• Fix: Compatibility with --enable-frozen-string-literal (#2033)
• Fix: Rack 3.1 compatibility (#2035)
  • Don't depend on Rack::Logger
  • Don't delete content-length header when Rack::Files is used

4.0.1 / 2025-05-24

• Rack 3.1 compatibility (#2035)

• Fix malformed Content-Type headers (#2081)

• Avoid crash for integer values in content_type parameters (#2078)

• Fix compatibility with --enable-frozen-string-literal (#2033)

• Declare missing dependencies for Ruby 3.5 (#2032)

• Fix warning about Hash construction. (#2028)

• Support Zeitwerk 2.7.0+ (#2050)

• Address URI depreciation (#2060)

#2035: sinatra/sinatra#2035 #2081: sinatra/sinatra#2081 #2078: sinatra/sinatra#2078 #2033: sinatra/sinatra#2033 #2032: sinatra/sinatra#2032 #2028: sinatra/sinatra#2028 #2050: sinatra/sinatra#2050 #2060: sinatra/sinatra#2060

4.0.0. / 2024-01-19

• New: Add support for Rack 3 (#1857)

... (truncated)

• 7b50a1b 4.1.1 release (#2068)
• 3f6c577 Restore WEBrick support (#2067)
• 38cd687 Multiple \<dd> tags breaks the website HTML (#2066)
• 80c3ad6 Update CHANGELOG with correct CVE (#2064)
• 73f3291 4.1.0 release (#2063)
• cd3e00d Add HostAuthorization rack-protection middleware (#2053)
• 8c4cd0b Return an instance of Sinatra::IndifferentHash when calling #except (#2044)
• 3c888f7 Address URI depreciation (#2060)
• 0d33ef8 CI: don't test falcon on Ruby 2.7
• 4a55850 Remove WEBrick
• Additional commits viewable in compare view

Sourced from rack's releases.

v3.0.9.1

What's Changed

• Fixed ReDoS in Accept header parsing [CVE-2024-26146]
• Fixed ReDoS in Content Type header parsing [CVE-2024-25126]
• Reject Range headers which are too large [CVE-2024-26141]

Full Changelog: https://github.com/rack/rack/compare/v3.0.9...v3.0.9.1

v3.0.9

What's Changed

• Fix content-length calcuation in Rack:Response#write #2150

Full Changelog: https://github.com/rack/rack/compare/v3.0.8...v3.0.9

v3.0.8

What's Changed

• Backport "Fix some unused variable verbose warnings" by @​skipkayhil in rack/rack#2084

New Contributors

• @​skipkayhil made their first contribution in rack/rack#2084

Full Changelog: https://github.com/rack/rack/compare/v3.0.7...v3.0.8

v3.0.7

What's Changed

• Backport "Make query parameters without = have nil values". by @​jeremyevans in rack/rack#2060

Full Changelog: https://github.com/rack/rack/compare/v3.0.6.1...v3.0.7

v3.0.6.1

No release notes provided.

v3.0.4.1

Full Changelog: https://github.com/rack/rack/compare/v3.0.4...v3.0.4.1

v3.0.4

Full Changelog: https://github.com/rack/rack/compare/v3.0.3...v3.0.4

v3.0.3

What's Changed

• Release v3.0.3 by @​ioquatix in rack/rack#2000

Full Changelog: https://github.com/rack/rack/compare/v3.0.2...v3.0.3

v3.0.2

Full Changelog: https://github.com/rack/rack/compare/v3.0.1...v3.0.2

Sourced from rack's changelog.

[3.2.0] - 2025-07-31

This release continues Rack's evolution toward a cleaner, more efficient foundation while maintaining backward compatibility for most applications. The breaking changes primarily affect deprecated functionality, so most users should experience a smooth upgrade with improved performance and standards compliance.

SPEC Changes

• Request environment keys must now be strings. (#2310, [@​jeremyevans])
• Add nil as a valid return from a Response body.to_path (#2318, [@​MSP-Greg])
• Rack::Lint#check_header_value is relaxed, only disallowing CR/LF/NUL characters. (#2354, [@​ioquatix])

Added

• Introduce Rack::VERSION constant. (#2199, [@​ioquatix])
• ISO-2022-JP encoded parts within MIME Multipart sections of an HTTP request body will now be converted to UTF-8. (#2245, @​nappa)
• Add Rack::Request#query_parser= to allow setting the query parser to use. (#2349, [@​jeremyevans])
• Add Rack::Request#form_pairs to access form data as raw key-value pairs, preserving duplicate keys. (#2351, [@​matthewd])

Changed

• Invalid cookie keys will now raise an error. (#2193, [@​ioquatix])
• Rack::MediaType#params now handles empty strings. (#2229, [@​jeremyevans])
• Avoid unnecessary calls to the ip_filter lambda to evaluate Request#ip (#2287, [@​willbryant])
• Only calculate Request#ip once per request (#2292, [@​willbryant])
• Rack::Builder #use, #map, and #run methods now return nil. (#2355, [@​ioquatix])
• Directly close the body in Rack::ConditionalGet when the response is 304 Not Modified. (#2353, [@​ioquatix])
• Directly close the body in Rack::Head when the request method is HEAD(#2360, @​skipkayhil)

Deprecated

• Rack::Auth::AbstractRequest#request is deprecated without replacement. (#2229, [@​jeremyevans])
• Rack::Request#parse_multipart (private method designed to be overridden in subclasses) is deprecated without replacement. (#2229, [@​jeremyevans])

Removed

• Rack::Request#values_at is removed. (#2200, [@​ioquatix])
• Rack::Logger is removed with no replacement. (#2196, [@​ioquatix])
• Automatic cache invalidation in Rack::Request#{GET,POST} has been removed. (#2230, [@​jeremyevans])
• Support for CGI::Cookie has been removed. (#2332, [@​ioquatix])

Fixed

• Rack::RewindableInput::Middleware no longer wraps a nil input. (#2259, @​tt)
• Fix NoMethodError in Rack::Request#wrap_ipv6 when x-forwarded-host is empty. (#2270, @​oieioi)
• Fix the specification for SERVER_PORT which was incorrectly documented as required to be an Integer if present - it must be a String containing digits only. (#2296, [@​ioquatix])
• SERVER_NAME and HTTP_HOST are now more strictly validated according to the relevant specifications. (#2298, [@​ioquatix])
• Rack::Lint now disallows PATH_INFO="" SCRIPT_NAME="". (#2298, [@​jeremyevans])

[3.1.16] - 2025-06-04

Security

... (truncated)

• b68251c Bump minor version.
• a6ba717 Minor updates to README and CHANGELOG.
• 9e10390 Directly close the body in Rack::Head. (#2360)
• 36156aa Ensure truthy is used consistently in the context of hijacking support in R...
• 7d09de4 Tidy up checks for script_name, path_info. (#2357)
• 5ce04c1 lint.rb consistency improvements. (#2352)
• 5f06728 Regenerate SPEC.rdoc.
• 9453930 Make Rack::Lint disallow PATH_INFO="" SCRIPT_NAME="" (#2316)
• 6828a17 Directly close the body. (#2353)
• f01e2b5 Relax check_header_value. (#2354)
• Additional commits viewable in compare view

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