Sourced from fast-xml-parser's releases.

fix entity expansion and incorrect replacement and performance

Full Changelog: https://github.com/NaturalIntelligence/fast-xml-parser/compare/v5.5.5...v5.5.6

support onDangerousProperty

Full Changelog: https://github.com/NaturalIntelligence/fast-xml-parser/compare/v5.5.3...v5.5.5

update dependecies to fix typings

Full Changelog: https://github.com/NaturalIntelligence/fast-xml-parser/compare/v5.5.1...v5.5.2

integrate path-expression-matcher

• support path-expression-matcher
• fix: stopNode should not be parsed
• performance improvement for stopNode checking

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

4.5.5 / 2026-03-22

apply fixes from v5 (legacy maintenance branch v4-maintenance)

• support maxEntityCount
• support onDangerousProperty
• support maxNestedTags
• handle prototype pollution
• fix incorrect entity name replacement
• fix incorrect condition for entity expansion

5.5.8 / 2026-03-20

• pass read only matcher in callback

5.5.7 / 2026-03-19

• fix: entity expansion limits
• update strnum package to 2.2.0

5.5.6 / 2026-03-16

• update builder dependency
• fix incorrect regex to replace . in entity name
• fix check for entitiy expansion for lastEntities and html entities too

5.5.5 / 2026-03-13

• sanitize dangerous tag or attribute name
• error on critical property name
• support onDangerousProperty option

5.5.4 / 2026-03-13

• declare Matcher & Expression as unknown so user is not forced to install path-expression-matcher

5.5.3 / 2026-03-11

• upgrade builder

5.5.2 / 2026-03-11

• update dependency to fix typings

5.5.1 / 2026-03-10

• fix dependency

5.5.0 / 2026-03-10

• support path-expression-matcher
• fix: stopNode should not be parsed
• performance improvement for stopNode checking

... (truncated)

• a92a665 pass read only matcher in call back
• a21c441 update package detail
• 239b64a check for min value for entity exapantion options
• 61cb666 restrict more properties to be unsafe
• 41abd66 performance improvement of reading DOCTYPE
• 3dfcd20 refactor: performance improvement
• 870043e update release info
• 6df401e update builder dependency
• bd26122 check for entitiy expansion for lastEntities and html entities too
• 7e70dd8 fix incorrect regex to replace . in entity name
• Additional commits viewable in compare view

Sourced from @​aws-sdk/xml-builder's changelog.

3.972.15 (2026-03-20)

Chores

• xml-builder: bump fast-xml-parser to 5.5.8 (#7876) (80ef601)

3.972.14 (2026-03-18)

Bug Fixes

• xml-builder: configure maxTotalExpansions on fast-xml-parser (#7868) (2ad1477)

Chores

• xml-builder: single-pass XML escape for escapeElement and escapeAttribute (#7833) (97de564)

3.972.12 (2026-03-18)

Chores

• bump fast-xml-parser to 5.5.6 (#7862) (5e8d73b)

• See full diff in compare view

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