toss/es-toolkit v1.53.1

on GitHub

Released on October 31st, 2026.

This release includes security fixes for es-toolkit/compat, and we recommend upgrading. The fixes match Lodash, so results may differ if you relied on the previous behavior.

• Fixed compat/template to reject variable values and imports keys that are not plain parameter names, and to replace all whitespace in sourceURL, preventing code injection.
• Fixed compat/defaultsDeep to ignore __proto__ keys, preventing prototype pollution.
• Fixed compat/unset, compat/omit, and compat/pullAt to stop when __proto__, constructor, or prototype appears before the last path key, preventing the deletion of built-in prototype properties.

The following are other fixes in this release.

• Fixed clone to preserve the offset and length of a DataView. ([#2166])
• Fixed split to keep surrogate pairs and combining marks together for an empty separator. ([#2171])
• Fixed withTimeout to clear its timer after the operation completes. ([#2170])
• Fixed compat/pickBy to not treat objects with a numeric length as array-like. ([#2165])
• Fixed compat/findLast and compat/some to not treat length as an element of array-likes. ([#2168])

We sincerely thank @arba-octo, @dayongkr, @frogscooper, and @KooYS for their contributions. We appreciate your great efforts!