dependabot[bot] opened a new pull request, #382: URL: https://github.com/apache/yetus/pull/382
Bumps [rack](https://github.com/rack/rack) from 3.1.20 to 3.1.21. <details> <summary>Changelog</summary> <p><em>Sourced from <a href="https://github.com/rack/rack/blob/main/CHANGELOG.md";>rack's changelog</a>.</em></p> <blockquote> <h2>[3.1.21] - 2026-04-01</h2> <h3>Security</h3> <ul> <li><a href="https://github.com/advisories/GHSA-7mqq-6cf9-v2qp";>CVE-2026-34763</a> Root directory disclosure via unescaped regex interpolation in <code>Rack::Directory</code>.</li> <li><a href="https://github.com/advisories/GHSA-v569-hp3g-36wr";>CVE-2026-34230</a> Avoid O(n^2) algorithm in <code>Rack::Utils.select_best_encoding</code> which could lead to denial of service.</li> <li><a href="https://github.com/advisories/GHSA-qfgr-crr9-7r49";>CVE-2026-32762</a> Forwarded header semicolon injection enables Host and Scheme spoofing.</li> <li><a href="https://github.com/advisories/GHSA-vgpv-f759-9wx3";>CVE-2026-26961</a> Raise error for multipart requests with multiple boundary parameters.</li> <li><a href="https://github.com/advisories/GHSA-q4qf-9j86-f5mh";>CVE-2026-34786</a> <code>Rack::Static</code> <code>header_rules</code> bypass via URL-encoded path mismatch.</li> <li><a href="https://github.com/advisories/GHSA-q2ww-5357-x388";>CVE-2026-34831</a> <code>Content-Length</code> mismatch in <code>Rack::Files</code> error responses.</li> <li><a href="https://github.com/advisories/GHSA-x8cg-fq8g-mxfx";>CVE-2026-34826</a> Multipart byte range processing allows denial of service via excessive overlapping ranges.</li> <li><a href="https://github.com/advisories/GHSA-g2pf-xv49-m2h5";>CVE-2026-34835</a> <code>Rack::Request</code> accepts invalid Host characters, enabling host allowlist bypass.</li> <li><a href="https://github.com/advisories/GHSA-qv7j-4883-hwh7";>CVE-2026-34830</a> <code>Rack::Sendfile</code> header-based <code>X-Accel-Mapping</code> regex injection enables unauthorized <code>X-Accel-Redirect</code>.</li> <li><a href="https://github.com/advisories/GHSA-h2jq-g4cq-5ppq";>CVE-2026-34785</a> <code>Rack::Static</code> prefix matching can expose unintended files under the static root.</li> <li><a href="https://github.com/advisories/GHSA-8vqr-qjwx-82mw";>CVE-2026-34829</a> Multipart parsing without <code>Content-Length</code> header allows unbounded chunked file uploads.</li> <li><a href="https://github.com/advisories/GHSA-v6x5-cg8r-vv6x";>CVE-2026-34827</a> Multipart header parsing allows denial of service via escape-heavy quoted parameters.</li> </ul> </blockquote> </details> <details> <summary>Commits</summary> <ul> <li><a href="https://github.com/rack/rack/commit/ae8431120e66e92d1885ab8ec0a553d9cad5ec13";><code>ae84311</code></a> Bump patch version.</li> <li><a href="https://github.com/rack/rack/commit/87961c306df1894fb5efaa57d29179091b4bc194";><code>87961c3</code></a> Fix typo in test.</li> <li><a href="https://github.com/rack/rack/commit/fd1c23dc762225e68b50d392142e6a6bf54bf9af";><code>fd1c23d</code></a> Add <code>logger</code> to gemfile.</li> <li><a href="https://github.com/rack/rack/commit/c59d924f215e41ae8ce1bae1633c34f1ca64b182";><code>c59d924</code></a> Fix test expectation.</li> <li><a href="https://github.com/rack/rack/commit/176f468e0d575e2f4d7583ff95f30bb53360e3fe";><code>176f468</code></a> Add Ruby v4.0 to the test matrix.</li> <li><a href="https://github.com/rack/rack/commit/28569342665fee07f161f0974826eb85c1244533";><code>2856934</code></a> Drop EOL Rubies from external tests.</li> <li><a href="https://github.com/rack/rack/commit/17ce7836be1523a7b453f3c06fe070ad7c954708";><code>17ce783</code></a> Limit the number of quoted escapes during multipart parsing</li> <li><a href="https://github.com/rack/rack/commit/367a2a0ec6fbef605c9412dadfd5763b7867441f";><code>367a2a0</code></a> Add Content-Length size check in Rack::Multipart::Parser</li> <li><a href="https://github.com/rack/rack/commit/a17cb99b3440a4db09fb920407adf5ead127704c";><code>a17cb99</code></a> Fix root prefix bug in Rack::Static</li> <li><a href="https://github.com/rack/rack/commit/59a0966a484f2903833fa3e4c81919d3c645738d";><code>59a0966</code></a> Only do a simple substitution on the x-accel-mapping paths</li> <li>Additional commits viewable in <a href="https://github.com/rack/rack/compare/v3.1.20...v3.1.21";>compare view</a></li> </ul> </details> <br /> [](https://docs.github.com/en/github/managing-security-vulnerabilities/about-dependabot-security-updates#about-compatibility-scores) Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. 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