Sourced from fast-xml-parser's changelog.

Note: If you find missing information about particular minor version, that version must have been changed without any functional change in this library.

Note: Due to some last quick changes on v4, detail of v4.5.3 & v4.5.4 are not updated here. v4.5.4x is the last tag of v4 in github repository. I'm extremely sorry for the confusion

5.7.1 / 2026-04-20

• fix #705: attributesGroupName working with preserveOrder
• fix #817: stackoverflow when tag expression is very long

5.7.0 / 2026-04-17

• Use @nodable/entities v2.1.0
  • breaking changes
    • single entity scan. You're not allowed to user entity value to form another entity name.
    • you cant add numeric external entity
    • entity error message when expantion limit is crossed might change
  • typings are updated for new options related to process entity
  • please follow documentation of @nodable/entities for more detail.
  • performance
    • if processEntities is false, then there should not be impact on performance.
    • if processEntities is true, but you dont pass entity decoder separately then performance may degrade by approx 8-10%
    • if processEntities is true, and you pass entity decoder separately
      • if no entity then performance should be same as before
      • if there are entities then performance should be increased from past versions
  • ignoreAttributes is not required to be set to set xml version for NCR entity value
• update 'fast-xml-builder' to sanitize malicious CDATA and comment's content

5.6.0 / 2026-04-15

• fix: entity replacement for numeric entities
• use @​nodable/entities to replace entities
  • this may change some error messages related to entities expansion limit or inavlid use
  • post check would be exposed in future version

5.5.12 / 2026-04-13

• Performance Improvement: update path-expression-matcher
  • use proxy pattern than Proxy class

5.5.11 / 2026-04-08

• Performance Improvement
  • integrate ExpressionSet for stopNodes

5.5.10 / 2026-04-03

• increase default entity explansion limit as many projects demand for that
• performance improvement
  • reduce calls to toString
  • early return when entities are not present
  • prepare rawAttrsForMatcher only if user sets jPath: false

5.5.9 / 2026-03-23

• combine typing files

... (truncated)

• 5d8a891 update for release
• 77e8409 update issue template
• 898a453 performance: update path-expression-matcher
• 12b041d update for release 5.5.11
• fec1e56 Integrate ExpressionSet
• f20e2bf reduce multilevel property reference
• 69da9ba avoid repeated object.keys operation
• 4c8651f make unpaired tags as Set
• 217c46a performance: separate method to looup single char
• 000de2d performance improvement
• See full diff in compare view

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