js-yaml

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

Same major only

1 release in betweenevery note read

Other targets from 5.2.1Newest 5.x, Latest5.5.0 Clears its 2 advisories5.4.1

0
changes to make: 1
advisory fixed: 0
new: 1
fix

Security

1 advisory still affects 5.2.2

js-yaml: maxTotalMergeKeys does not limit CPU use for empty merge sourcesmoderate · GHSA-r3ph-w7gj-g6xm

Upgrading to 5.4.1 clears it.

Fixes 1 advisory affecting 5.2.1

js-yaml: Exponential parsing time in flow collections leads to denial of servicehigh · GHSA-pm4m-ph32-ghv5

Avoid exponential parsing time for nested flow sequence pairs.
5.2.2

Release by release

5.2.2
23 Jul 20261 fix
- fixed
  Quote flow scalars where a colon precedes a flow indicator, #773.

Upgrade to 5.2.2

npm install js-yaml@5.2.2

What 5.2.2 needs

Reading 5.2.2's manifest…

Check against your package.json

Which of your other dependencies stand in the way of 5.2.2. 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 5.2.2.