[backport] Added maxTotalMergeKeys (10000) loader option to limit the total number of
keys processed by YAML merge (<<) across one load() / loadAll() call.
Fixed
Restore umd builds back to es5.
Removed
[backport] maxMergeSeqLength replaced with maxTotalMergeKeys for limiting YAML merge
processing.
[4.2.0] - 2026-06-01
Added
Added docs/safety.md with notes about processing untrusted YAML.
Added maxDepth (100) loader option. Not a problem, but gives a better
exception instead of RangeError on stack overflow.
Added maxMergeSeqLength (20) loader option. Not a problem after merge fix,
but an additional restriction for safety.
Added sourcemaps to dist/ builds.
Changed
Stop resolving numbers with underscores as numeric scalars, #627.
Switched dev toolchains to Vite / neostandard.
Updated demo.
Reorganized tests.
dist/ files are no longer kept in the repository.
Fixed
Fix parsing of properties on the first implicit block mapping key, #62.
Fix trailing whitespace handling when folding flow scalar lines, #307.
Reject top-level block scalars without content indentation, #280.
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Bumps [js-yaml](https://github.com/nodeca/js-yaml) from 4.1.1 to 4.3.0.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a href="https://github.com/nodeca/js-yaml/blob/4.3.0/CHANGELOG.md">js-yaml's changelog</a>.</em></p>
<blockquote>
<h2>4.3.0 - 2026-06-27</h2>
<h3>Added</h3>
<ul>
<li>[backport] Added <code>maxTotalMergeKeys</code> (10000) loader option to limit the total number of
keys processed by YAML merge (<code><<</code>) across one <code>load()</code> / <code>loadAll()</code> call.</li>
</ul>
<h3>Fixed</h3>
<ul>
<li>Restore umd builds back to es5.</li>
</ul>
<h3>Removed</h3>
<ul>
<li>[backport] <code>maxMergeSeqLength</code> replaced with <code>maxTotalMergeKeys</code> for limiting YAML merge
processing.</li>
</ul>
<h2>[4.2.0] - 2026-06-01</h2>
<h3>Added</h3>
<ul>
<li>Added <code>docs/safety.md</code> with notes about processing untrusted YAML.</li>
<li>Added <code>maxDepth</code> (100) loader option. Not a problem, but gives a better
exception instead of RangeError on stack overflow.</li>
<li>Added <code>maxMergeSeqLength</code> (20) loader option. Not a problem after <code>merge</code> fix,
but an additional restriction for safety.</li>
<li>Added sourcemaps to <code>dist/</code> builds.</li>
</ul>
<h3>Changed</h3>
<ul>
<li>Stop resolving numbers with underscores as numeric scalars, <a href="https://redirect.github.com/nodeca/js-yaml/issues/627">#627</a>.</li>
<li>Switched dev toolchains to Vite / neostandard.</li>
<li>Updated demo.</li>
<li>Reorganized tests.</li>
<li><code>dist/</code> files are no longer kept in the repository.</li>
</ul>
<h3>Fixed</h3>
<ul>
<li>Fix parsing of properties on the first implicit block mapping key, <a href="https://redirect.github.com/nodeca/js-yaml/issues/62">#62</a>.</li>
<li>Fix trailing whitespace handling when folding flow scalar lines, <a href="https://redirect.github.com/nodeca/js-yaml/issues/307">#307</a>.</li>
<li>Reject top-level block scalars without content indentation, <a href="https://redirect.github.com/nodeca/js-yaml/issues/280">#280</a>.</li>
<li>Ensure numbers survive round-trip, <a href="https://redirect.github.com/nodeca/js-yaml/issues/737">#737</a>.</li>
<li>Fix test coverage for issue <a href="https://redirect.github.com/nodeca/js-yaml/issues/221">#221</a>.</li>
<li>Fix flow scalar trailing whitespace folding, <a href="https://redirect.github.com/nodeca/js-yaml/issues/307">#307</a>.</li>
<li>Fix digits in YAML named tag handles.</li>
</ul>
<h3>Security</h3>
<ul>
<li>Fix potential DoS via quadratic complexity in merge - deduplicate repeated
elements (makes sense for malformed files > 10K).</li>
</ul>
<h2>[3.14.2] - 2025-11-15</h2>
<h3>Security</h3>
<ul>
<li>Backported v4.1.1 fix to v3</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/nodeca/js-yaml/commit/33d05b5d29a8c21360f620f7e1c1706e24522eda"><code>33d05b5</code></a> 4.3.0 released</li>
<li><a href="https://github.com/nodeca/js-yaml/commit/663bfab6db2b4a146a9366fd685f069345be4ddb"><code>663bfab</code></a> Drop demo publish, to not override new v5 one.</li>
<li><a href="https://github.com/nodeca/js-yaml/commit/1cb8c7b94bf75e15116869c1c0482dcb22785986"><code>1cb8c7b</code></a> Add v4-legacy tag for publish</li>
<li><a href="https://github.com/nodeca/js-yaml/commit/02f27afad532763263cd2b6be35c24ee8e1f6157"><code>02f27af</code></a> Restore umd builds back to es5</li>
<li><a href="https://github.com/nodeca/js-yaml/commit/8be84edaf15e7c394fa3b813179d1bcc280e87fb"><code>8be84ed</code></a> Fix es5 compatibility</li>
<li><a href="https://github.com/nodeca/js-yaml/commit/59423c6f8cdc78742ac00e25a4dd39ef16b702e4"><code>59423c6</code></a> Replace <code>maxMergeSeqLength</code> option with <code>maxTotalMergeKeys</code> (more robust). Ba...</li>
<li><a href="https://github.com/nodeca/js-yaml/commit/6842ef6a02df01ca7282ea01dc3c70787710c05d"><code>6842ef6</code></a> doc polish</li>
<li><a href="https://github.com/nodeca/js-yaml/commit/590dbabadd172b099c07654fab2eabec8c7a07b9"><code>590dbab</code></a> 4.2.0 released</li>
<li><a href="https://github.com/nodeca/js-yaml/commit/f944dc5cd132251752499bdb157f33027d362177"><code>f944dc5</code></a> Add package.json funding field</li>
<li><a href="https://github.com/nodeca/js-yaml/commit/f6927192223355b64f2a6e19f3071ccc579ee718"><code>f692719</code></a> Changelog update</li>
<li>Additional commits viewable in <a href="https://github.com/nodeca/js-yaml/compare/4.1.1...4.3.0">compare view</a></li>
</ul>
</details>
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Bumps js-yaml from 4.1.1 to 4.3.0.
Changelog
Sourced from js-yaml's changelog.
Commits
33d05b54.3.0 released663bfabDrop demo publish, to not override new v5 one.1cb8c7bAdd v4-legacy tag for publish02f27afRestore umd builds back to es58be84edFix es5 compatibility59423c6ReplacemaxMergeSeqLengthoption withmaxTotalMergeKeys(more robust). Ba...6842ef6doc polish590dbab4.2.0 releasedf944dc5Add package.json funding fieldf692719Changelog updateDependabot 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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