Bumps [urllib3](https://github.com/urllib3/urllib3) from 2.5.0 to 2.6.3. <details> <summary>Release notes</summary> <p><em>Sourced from <a href="https://github.com/urllib3/urllib3/releases">urllib3's releases</a>.</em></p> <blockquote> <h2>2.6.3</h2> <h2>🚀 urllib3 is fundraising for HTTP/2 support</h2> <p><a href="https://sethmlarson.dev/urllib3-is-fundraising-for-http2-support">urllib3 is raising ~$40,000 USD</a> to release HTTP/2 support and ensure long-term sustainable maintenance of the project after a sharp decline in financial support. If your company or organization uses Python and would benefit from HTTP/2 support in Requests, pip, cloud SDKs, and thousands of other projects <a href="https://opencollective.com/urllib3">please consider contributing financially</a> to ensure HTTP/2 support is developed sustainably and maintained for the long-haul.</p> <p>Thank you for your support.</p> <h2>Changes</h2> <ul> <li>Fixed a security issue where decompression-bomb safeguards of the streaming API were bypassed when HTTP redirects were followed. (CVE-2026-21441 reported by <a href="https://github.com/D47A"><code>@​D47A</code></a>, 8.9 High, GHSA-38jv-5279-wg99)</li> <li>Started treating <code>Retry-After</code> times greater than 6 hours as 6 hours by default. (<a href="https://redirect.github.com/urllib3/urllib3/issues/3743">urllib3/urllib3#3743</a>)</li> <li>Fixed <code>urllib3.connection.VerifiedHTTPSConnection</code> on Emscripten. (<a href="https://redirect.github.com/urllib3/urllib3/issues/3752">urllib3/urllib3#3752</a>)</li> </ul> <h2>2.6.2</h2> <h2>🚀 urllib3 is fundraising for HTTP/2 support</h2> <p><a href="https://sethmlarson.dev/urllib3-is-fundraising-for-http2-support">urllib3 is raising ~$40,000 USD</a> to release HTTP/2 support and ensure long-term sustainable maintenance of the project after a sharp decline in financial support. If your company or organization uses Python and would benefit from HTTP/2 support in Requests, pip, cloud SDKs, and thousands of other projects <a href="https://opencollective.com/urllib3">please consider contributing financially</a> to ensure HTTP/2 support is developed sustainably and maintained for the long-haul.</p> <p>Thank you for your support.</p> <h2>Changes</h2> <ul> <li>Fixed <code>HTTPResponse.read_chunked()</code> to properly handle leftover data in the decoder's buffer when reading compressed chunked responses. (<a href="https://redirect.github.com/urllib3/urllib3/issues/3734">urllib3/urllib3#3734</a>)</li> </ul> <h2>2.6.1</h2> <h2>🚀 urllib3 is fundraising for HTTP/2 support</h2> <p><a href="https://sethmlarson.dev/urllib3-is-fundraising-for-http2-support">urllib3 is raising ~$40,000 USD</a> to release HTTP/2 support and ensure long-term sustainable maintenance of the project after a sharp decline in financial support. If your company or organization uses Python and would benefit from HTTP/2 support in Requests, pip, cloud SDKs, and thousands of other projects <a href="https://opencollective.com/urllib3">please consider contributing financially</a> to ensure HTTP/2 support is developed sustainably and maintained for the long-haul.</p> <p>Thank you for your support.</p> <h2>Changes</h2> <ul> <li>Restore previously removed <code>HTTPResponse.getheaders()</code> and <code>HTTPResponse.getheader()</code> methods. (<a href="https://redirect.github.com/urllib3/urllib3/issues/3731">#3731</a>)</li> </ul> <h2>2.6.0</h2> <h2>🚀 urllib3 is fundraising for HTTP/2 support</h2> <p><a href="https://sethmlarson.dev/urllib3-is-fundraising-for-http2-support">urllib3 is raising ~$40,000 USD</a> to release HTTP/2 support and ensure long-term sustainable maintenance of the project after a sharp decline in financial support. If your company or organization uses Python and would benefit from HTTP/2 support in Requests, pip, cloud SDKs, and thousands of other projects <a href="https://opencollective.com/urllib3">please consider contributing financially</a> to ensure HTTP/2 support is developed sustainably and maintained for the long-haul.</p> <p>Thank you for your support.</p> <h2>Security</h2> <ul> <li>Fixed a security issue where streaming API could improperly handle highly compressed HTTP content (&quot;decompression bombs&quot;) leading to excessive resource consumption even when a small amount of data was requested. Reading small chunks of compressed data is safer and much more efficient now. (CVE-2025-66471 reported by <a href="https://github.com/Cycloctane"><code>@​Cycloctane</code></a>, 8.9 High, GHSA-2xpw-w6gg-jr37)</li> <li>Fixed a security issue where an attacker could compose an HTTP response with virtually unlimited links in the <code>Content-Encoding</code> header, potentially leading to a denial of service (DoS) attack by exhausting system resources during decoding. The number of allowed chained encodings is now limited to 5. (CVE-2025-66418 reported by <a href="https://github.com/illia-v"><code>@​illia-v</code></a>, 8.9 High, GHSA-gm62-xv2j-4w53)</li> </ul> <blockquote> <p>[!IMPORTANT]</p> <ul> <li>If urllib3 is not installed with the optional <code>urllib3[brotli]</code> extra, but your environment contains a Brotli/brotlicffi/brotlipy package anyway, make sure to upgrade it to at least Brotli 1.2.0 or brotlicffi 1.2.0.0 to benefit from the security fixes and avoid warnings. Prefer using <code>urllib3[brotli]</code> to install a compatible Brotli package automatically.</li> </ul> </blockquote> <!-- raw HTML omitted --> </blockquote> <p>... (truncated)</p> </details> <details> <summary>Changelog</summary> <p><em>Sourced from <a href="https://github.com/urllib3/urllib3/blob/main/CHANGES.rst">urllib3's changelog</a>.</em></p> <blockquote> <h1>2.6.3 (2026-01-07)</h1> <ul> <li>Fixed a high-severity security issue where decompression-bomb safeguards of the streaming API were bypassed when HTTP redirects were followed. (<code>GHSA-38jv-5279-wg99 &lt;https://github.com/urllib3/urllib3/security/advisories/GHSA-38jv-5279-wg99&gt;</code>__)</li> <li>Started treating <code>Retry-After</code> times greater than 6 hours as 6 hours by default. (<code>[#3743](https://github.com/urllib3/urllib3/issues/3743) &lt;https://github.com/urllib3/urllib3/issues/3743&gt;</code>__)</li> <li>Fixed <code>urllib3.connection.VerifiedHTTPSConnection</code> on Emscripten. (<code>[#3752](https://github.com/urllib3/urllib3/issues/3752) &lt;https://github.com/urllib3/urllib3/issues/3752&gt;</code>__)</li> </ul> <h1>2.6.2 (2025-12-11)</h1> <ul> <li>Fixed <code>HTTPResponse.read_chunked()</code> to properly handle leftover data in the decoder's buffer when reading compressed chunked responses. (<code>[#3734](https://github.com/urllib3/urllib3/issues/3734) &lt;https://github.com/urllib3/urllib3/issues/3734&gt;</code>__)</li> </ul> <h1>2.6.1 (2025-12-08)</h1> <ul> <li>Restore previously removed <code>HTTPResponse.getheaders()</code> and <code>HTTPResponse.getheader()</code> methods. (<code>[#3731](https://github.com/urllib3/urllib3/issues/3731) &lt;https://github.com/urllib3/urllib3/issues/3731&gt;</code>__)</li> </ul> <h1>2.6.0 (2025-12-05)</h1> <h2>Security</h2> <ul> <li>Fixed a security issue where streaming API could improperly handle highly compressed HTTP content (&quot;decompression bombs&quot;) leading to excessive resource consumption even when a small amount of data was requested. Reading small chunks of compressed data is safer and much more efficient now. (<code>GHSA-2xpw-w6gg-jr37 &lt;https://github.com/urllib3/urllib3/security/advisories/GHSA-2xpw-w6gg-jr37&gt;</code>__)</li> <li>Fixed a security issue where an attacker could compose an HTTP response with virtually unlimited links in the <code>Content-Encoding</code> header, potentially leading to a denial of service (DoS) attack by exhausting system resources during decoding. The number of allowed chained encodings is now limited to 5. (<code>GHSA-gm62-xv2j-4w53 &lt;https://github.com/urllib3/urllib3/security/advisories/GHSA-gm62-xv2j-4w53&gt;</code>__)</li> </ul> <p>.. caution::</p> <ul> <li>If urllib3 is not installed with the optional <code>urllib3[brotli]</code> extra, but your environment contains a Brotli/brotlicffi/brotlipy package anyway, make sure to upgrade it to at least Brotli 1.2.0 or brotlicffi 1.2.0.0 to benefit from the security fixes and avoid warnings. Prefer using</li> </ul> <!-- raw HTML omitted --> </blockquote> <p>... (truncated)</p> </details> <details> <summary>Commits</summary> <ul> <li><a href="https://github.com/urllib3/urllib3/commit/0248277dd7ac0239204889ca991353ad3e3a1ddc"><code>0248277</code></a> Release 2.6.3</li> <li><a href="https://github.com/urllib3/urllib3/commit/8864ac407bba8607950025e0979c4c69bc7abc7b"><code>8864ac4</code></a> Merge commit from fork</li> <li><a href="https://github.com/urllib3/urllib3/commit/70cecb27ca99d56aaaeb63ac27ee270ef2b24c5c"><code>70cecb2</code></a> Fix Scorecard issues related to vulnerable dev dependencies (<a href="https://redirect.github.com/urllib3/urllib3/issues/3755">#3755</a>)</li> <li><a href="https://github.com/urllib3/urllib3/commit/41f249abe1ef3e20768588969c4035aba060a359"><code>41f249a</code></a> Move &quot;v2.0 Migration Guide&quot; to the end of the table of contents (<a href="https://redirect.github.com/urllib3/urllib3/issues/3747">#3747</a>)</li> <li><a href="https://github.com/urllib3/urllib3/commit/fd4dffd2fc544166b76151a2fa3d7b7c0eab540c"><code>fd4dffd</code></a> Patch <code>VerifiedHTTPSConnection</code> for Emscripten (<a href="https://redirect.github.com/urllib3/urllib3/issues/3752">#3752</a>)</li> <li><a href="https://github.com/urllib3/urllib3/commit/13f0bfd55e4468fe1ea9c6f809d3a87b0f93ebab"><code>13f0bfd</code></a> Handle massive values in Retry-After when calculating time to sleep for (<a href="https://redirect.github.com/urllib3/urllib3/issues/3743">#3743</a>)</li> <li><a href="https://github.com/urllib3/urllib3/commit/8c480bf87bcefd321b3a1ae47f04e908b6b2ed7b"><code>8c480bf</code></a> Bump actions/upload-artifact from 5.0.0 to 6.0.0 (<a href="https://redirect.github.com/urllib3/urllib3/issues/3748">#3748</a>)</li> <li><a href="https://github.com/urllib3/urllib3/commit/4b40616e959c0a2c466e8075f2a785a9f99bb0c1"><code>4b40616</code></a> Bump actions/cache from 4.3.0 to 5.0.1 (<a href="https://redirect.github.com/urllib3/urllib3/issues/3750">#3750</a>)</li> <li><a href="https://github.com/urllib3/urllib3/commit/82b8479663d037d220c883f1584dd01a43bb273b"><code>82b8479</code></a> Bump actions/download-artifact from 6.0.0 to 7.0.0 (<a href="https://redirect.github.com/urllib3/urllib3/issues/3749">#3749</a>)</li> <li><a href="https://github.com/urllib3/urllib3/commit/34284cb01700bb7d4fdd472f909e22393e9174e2"><code>34284cb</code></a> Mention experimental features in the security policy (<a href="https://redirect.github.com/urllib3/urllib3/issues/3746">#3746</a>)</li> <li>Additional commits viewable in <a href="https://github.com/urllib3/urllib3/compare/2.5.0...2.6.3">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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