js-yaml

5.5.0 · 15 Oct 2026MIT322.7M / weekRepository Homepage npm Atom feed

Same major only

1 release in betweennotes for 0

Other targets from 4.3.0Newest 4.x, Clears its 2 advisories4.3.2 Latest5.5.0

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changes to make: 1
advisory fixed: ?
new: ?
fixes

Counted from 0 of 1 release notes. Advisories are counted from the advisory database, in full.

Security

1 advisory still affects 4.3.1

js-yaml: maxTotalMergeKeys does not limit CPU use for empty merge sourceshigh · GHSA-2883-xcg3-v3hh

Upgrading to 4.3.2 clears it.

Fixes 1 advisory affecting 4.3.0

JS-YAML: Quadratic CPU consumption in !!omap resolution (3.x and 4.x) — CVE-2026-59870 fix not backportedhigh · GHSA-5p4m-2wfm-xmqj

Upgrade to 4.3.1

npm install js-yaml@4.3.1

What 4.3.1 needs

Reading 4.3.1's manifest…

Check against your package.json

Which of your other dependencies stand in the way of 4.3.1. Read once, not stored.

After upgrading

Run the type checker, the linter and the tests.
Build, and look for new deprecation warnings.
Update peer dependencies the new version asks for.
1 advisory still affects 4.3.1.