- Fix TOCTOU vulnerabilities in app_data and lock directory creation that could be exploited via symlink attacks - reported by :user:`tsigouris007`, fixed by :user:`gaborbernat`. (:issue:`3013`)
v20.36.0 (2026-01-07)
Features - 20.36.0
Add support for PEP 440 version specifiers in the --python flag. Users can now specify Python versions using operators like >=, <=, ~=, etc. For example: virtualenv --python=">=3.12" myenv. (:issue:2994`)
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Bumps [virtualenv](https://github.com/pypa/virtualenv) from 20.35.4 to 20.36.1.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/pypa/virtualenv/releases">virtualenv's releases</a>.</em></p>
<blockquote>
<h2>20.36.1</h2>
<!-- raw HTML omitted -->
<h2>What's Changed</h2>
<ul>
<li>release 20.36.0 by <a href="https://github.com/gaborbernat"><code>@gaborbernat</code></a> in <a href="https://redirect.github.com/pypa/virtualenv/pull/3011">pypa/virtualenv#3011</a></li>
<li>fix: resolve TOCTOU vulnerabilities in app_data and lock directory creation by <a href="https://github.com/gaborbernat"><code>@gaborbernat</code></a> in <a href="https://redirect.github.com/pypa/virtualenv/pull/3013">pypa/virtualenv#3013</a></li>
</ul>
<p><strong>Full Changelog</strong>: <a href="https://github.com/pypa/virtualenv/compare/20.36.0...20.36.1">https://github.com/pypa/virtualenv/compare/20.36.0...20.36.1</a></p>
<h2>20.36.0</h2>
<!-- raw HTML omitted -->
<h2>What's Changed</h2>
<ul>
<li>release 20.35.3 by <a href="https://github.com/gaborbernat"><code>@gaborbernat</code></a> in <a href="https://redirect.github.com/pypa/virtualenv/pull/2981">pypa/virtualenv#2981</a></li>
<li>fix: Prevent NameError when accessing _DISTUTILS_PATCH during file ov… by <a href="https://github.com/gracetyy"><code>@gracetyy</code></a> in <a href="https://redirect.github.com/pypa/virtualenv/pull/2982">pypa/virtualenv#2982</a></li>
<li>Upgrade pip and fix 3.15 picking old wheel by <a href="https://github.com/gaborbernat"><code>@gaborbernat</code></a> in <a href="https://redirect.github.com/pypa/virtualenv/pull/2989">pypa/virtualenv#2989</a></li>
<li>release 20.35.4 by <a href="https://github.com/gaborbernat"><code>@gaborbernat</code></a> in <a href="https://redirect.github.com/pypa/virtualenv/pull/2990">pypa/virtualenv#2990</a></li>
<li>fix: wrong path on migrated venv by <a href="https://github.com/sk1234567891"><code>@sk1234567891</code></a> in <a href="https://redirect.github.com/pypa/virtualenv/pull/2996">pypa/virtualenv#2996</a></li>
<li>test_too_many_open_files: assert on <code>errno.EMFILE</code> instead of <code>strerror</code> by <a href="https://github.com/pltrz"><code>@pltrz</code></a> in <a href="https://redirect.github.com/pypa/virtualenv/pull/3001">pypa/virtualenv#3001</a></li>
<li>fix: update filelock dependency version to 3.20.1 to fix CVE CVE-2025-68146 by <a href="https://github.com/pythonhubdev"><code>@pythonhubdev</code></a> in <a href="https://redirect.github.com/pypa/virtualenv/pull/3002">pypa/virtualenv#3002</a></li>
<li>fix: resolve EncodingWarning in tox upgrade environment by <a href="https://github.com/gaborbernat"><code>@gaborbernat</code></a> in <a href="https://redirect.github.com/pypa/virtualenv/pull/3007">pypa/virtualenv#3007</a></li>
<li>Fix Interpreter discovery bug wrt. Microsoft Store shortcut using Latin-1 by <a href="https://github.com/rahuldevikar"><code>@rahuldevikar</code></a> in <a href="https://redirect.github.com/pypa/virtualenv/pull/3006">pypa/virtualenv#3006</a></li>
<li>Add support for PEP 440 version specifiers in the <code>--python</code> flag. by <a href="https://github.com/rahuldevikar"><code>@rahuldevikar</code></a> in <a href="https://redirect.github.com/pypa/virtualenv/pull/3008">pypa/virtualenv#3008</a></li>
</ul>
<h2>New Contributors</h2>
<ul>
<li><a href="https://github.com/gracetyy"><code>@gracetyy</code></a> made their first contribution in <a href="https://redirect.github.com/pypa/virtualenv/pull/2982">pypa/virtualenv#2982</a></li>
<li><a href="https://github.com/sk1234567891"><code>@sk1234567891</code></a> made their first contribution in <a href="https://redirect.github.com/pypa/virtualenv/pull/2996">pypa/virtualenv#2996</a></li>
<li><a href="https://github.com/pltrz"><code>@pltrz</code></a> made their first contribution in <a href="https://redirect.github.com/pypa/virtualenv/pull/3001">pypa/virtualenv#3001</a></li>
<li><a href="https://github.com/pythonhubdev"><code>@pythonhubdev</code></a> made their first contribution in <a href="https://redirect.github.com/pypa/virtualenv/pull/3002">pypa/virtualenv#3002</a></li>
<li><a href="https://github.com/rahuldevikar"><code>@rahuldevikar</code></a> made their first contribution in <a href="https://redirect.github.com/pypa/virtualenv/pull/3006">pypa/virtualenv#3006</a></li>
</ul>
<p><strong>Full Changelog</strong>: <a href="https://github.com/pypa/virtualenv/compare/20.35.3...20.36.0">https://github.com/pypa/virtualenv/compare/20.35.3...20.36.0</a></p>
</blockquote>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a href="https://github.com/pypa/virtualenv/blob/main/docs/changelog.rst">virtualenv's changelog</a>.</em></p>
<blockquote>
<h2>v20.36.1 (2026-01-09)</h2>
<p>Bugfixes - 20.36.1</p>
<pre><code>- Fix TOCTOU vulnerabilities in app_data and lock directory creation that could be exploited via symlink attacks - reported by :user:`tsigouris007`, fixed by :user:`gaborbernat`. (:issue:`3013`)
<h2>v20.36.0 (2026-01-07)</h2>
<p>Features - 20.36.0
</code></pre></p>
<ul>
<li>Add support for PEP 440 version specifiers in the <code>--python</code> flag. Users can now specify Python versions using operators like <code>>=</code>, <code><=</code>, <code>~=</code>, etc. For example: <code>virtualenv --python=">=3.12" myenv</code> <code>. (:issue:</code>2994`)</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/pypa/virtualenv/commit/d0ad11d1146e81ea74d2461be9653f1da9cf3fd1"><code>d0ad11d</code></a> release 20.36.1</li>
<li><a href="https://github.com/pypa/virtualenv/commit/dec4cec5d16edaf83a00a658f32d1e032661cebc"><code>dec4cec</code></a> Merge pull request <a href="https://redirect.github.com/pypa/virtualenv/issues/3013">#3013</a> from gaborbernat/fix-sec</li>
<li><a href="https://github.com/pypa/virtualenv/commit/5fe5d38beb1273b489591a7b444f1018af2edf0a"><code>5fe5d38</code></a> release 20.36.0 (<a href="https://redirect.github.com/pypa/virtualenv/issues/3011">#3011</a>)</li>
<li><a href="https://github.com/pypa/virtualenv/commit/9719376addaa710b61d9ed013774fa26f6224b4e"><code>9719376</code></a> release 20.36.0</li>
<li><a href="https://github.com/pypa/virtualenv/commit/0276db6fcf8849c519d75465f659b12aefb2acd8"><code>0276db6</code></a> Add support for PEP 440 version specifiers in the <code>--python</code> flag. (<a href="https://redirect.github.com/pypa/virtualenv/issues/3008">#3008</a>)</li>
<li><a href="https://github.com/pypa/virtualenv/commit/4f900c29044e17812981b5b98ddce45604858b7f"><code>4f900c2</code></a> Fix Interpreter discovery bug wrt. Microsoft Store shortcut using Latin-1 (<a href="https://redirect.github.com/pypa/virtualenv/issues/3">#3</a>...</li>
<li><a href="https://github.com/pypa/virtualenv/commit/13afcc62a3444d0386c8031d0a62277a8274ab07"><code>13afcc6</code></a> fix: resolve EncodingWarning in tox upgrade environment (<a href="https://redirect.github.com/pypa/virtualenv/issues/3007">#3007</a>)</li>
<li><a href="https://github.com/pypa/virtualenv/commit/31b5d31581df3e3a7bbc55e52568b26dd01b0d57"><code>31b5d31</code></a> [pre-commit.ci] pre-commit autoupdate (<a href="https://redirect.github.com/pypa/virtualenv/issues/2997">#2997</a>)</li>
<li><a href="https://github.com/pypa/virtualenv/commit/7c284221b4751388801355fc6ebaa2abe60427bd"><code>7c28422</code></a> fix: update filelock dependency version to 3.20.1 to fix CVE CVE-2025-68146 (...</li>
<li><a href="https://github.com/pypa/virtualenv/commit/365628c544cd5498fbf0a3b6c6a8c1f41d25a749"><code>365628c</code></a> test_too_many_open_files: assert on <code>errno.EMFILE</code> instead of <code>strerror</code> (<a href="https://redirect.github.com/pypa/virtualenv/issues/3001">#3001</a>)</li>
<li>Additional commits viewable in <a href="https://github.com/pypa/virtualenv/compare/20.35.4...20.36.1">compare view</a></li>
</ul>
</details>
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Bumps virtualenv from 20.35.4 to 20.36.1.
Release notes
Sourced from virtualenv's releases.
Changelog
Sourced from virtualenv's changelog.
Commits
d0ad11drelease 20.36.1dec4cecMerge pull request #3013 from gaborbernat/fix-sec5fe5d38release 20.36.0 (#3011)9719376release 20.36.00276db6Add support for PEP 440 version specifiers in the--pythonflag. (#3008)4f900c2Fix Interpreter discovery bug wrt. Microsoft Store shortcut using Latin-1 (#3...13afcc6fix: resolve EncodingWarning in tox upgrade environment (#3007)31b5d31[pre-commit.ci] pre-commit autoupdate (#2997)7c28422fix: update filelock dependency version to 3.20.1 to fix CVE CVE-2025-68146 (...365628ctest_too_many_open_files: assert onerrno.EMFILEinstead ofstrerror(#3001)Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting
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