Sourced from qs's changelog.

6.16.0

• [New] stringify: add a depth option to bound recursion depth (default Infinity)
• [Fix] stringify: serialize Date values when a filter is provided
• [Fix] parse: enforce arrayLimit on comma groups under []= when throwOnLimitExceeded is set
• [Fix] parse: flatten a collection appended to an overflowed array (#571)
• [Fix] utils: isBuffer: do not invoke a non-callable constructor.isBuffer
• [Fix] stringify: do not let allowEmptyArrays skip cycle detection (or drop own keys) on an empty array with own properties
• [Fix] stringify: encode dots in a top-level key with a primitive value when encodeDotInKeys is set (#562)
• [Docs] threat model: clarify stringify deep-nesting DoS is caller-bounded
• [Docs] clarify arrayLimit is a representation threshold, not an element-count cap
• [Tests] parse: remove a test that pinned []= comma groups escaping arrayLimit
• [Tests] stringify: pin current encodeDotInKeys separator-dot behavior
• [Dev Deps] update @ljharb/eslint-config, eslint
• [Dev Deps] update eslint, evalmd

6.15.3

• [Fix] parse: enforce throwOnLimitExceeded for cumulative array growth via combine/merge
• [Fix] utils: respect encoding of surrogate pairs across chunks (#559)
• [Robustness] parse: throw the arrayLimit error before splitting oversized comma values
• [Robustness] utils.merge / utils.assign: avoid invoking __proto__ setter when copying own properties
• [Robustness] utils: enforce arrayLimit consistently across merge's array paths
• [Perf] utils: make compact O(n) via a side-channel visited-set instead of Array.indexOf
• [Deps] update side-channel
• [Dev Deps] update eslint, mock-property, tape
• [Tests] parse: characterize current lenient handling of unbalanced bracket keys (#558)

6.15.2

• [Fix] stringify: skip null/undefined entries in arrayFormat: 'comma' + encodeValuesOnly instead of crashing in encoder
• [Fix] stringify: use configured delimiter after charsetSentinel (#555)
• [Fix] stringify: apply formatter to encoded key under strictNullHandling (#554)
• [Fix] stringify: skip null/undefined filter-array entries instead of crashing in encoder (#551)
• [Fix] parse: handle nested bracket groups and add regression tests (#530); changes output for some unbalanced bracket keys (see #558)
• [readme] fix grammar (#550)
• [Dev Deps] update @ljharb/eslint-config
• [Tests] add regression tests for keys containing percent-encoded bracket text

6.15.1

• [Fix] parse: parameterLimit: Infinity with throwOnLimitExceeded: true silently drops all parameters
• [Deps] update @ljharb/eslint-config
• [Dev Deps] update @ljharb/eslint-config, iconv-lite
• [Tests] increase coverage

6.15.0

• [New] parse: add strictMerge option to wrap object/primitive conflicts in an array (#425, #122)
• [Fix] duplicates option should not apply to bracket notation keys (#514)

6.14.2

• [Fix] parse: mark overflow objects for indexed notation exceeding arrayLimit (#546)
• [Fix] arrayLimit means max count, not max index, in combine/merge/parseArrayValue
• [Fix] parse: throw on arrayLimit exceeded with indexed notation when throwOnLimitExceeded is true (#529)

... (truncated)

• bb9379e v6.16.0
• 62fd254 [Fix] stringify: serialize Date values when a filter is provided
• 8859c37 [Fix] parse: enforce arrayLimit on comma groups under []= when `throwOn...
• 8079adc [Tests] parse: remove a test that pinned []= comma groups escaping `array...
• d56f48c [Fix] parse: flatten a collection appended to an overflowed array
• e83d321 [Fix] utils: isBuffer: do not invoke a non-callable constructor.isBuffer
• 7e87a07 [Dev Deps] update @ljharb/eslint-config, eslint
• 9a76af2 [Dev Deps] update eslint, evalmd
• 3a890d4 [Dev Deps] update eslint, evalmd
• b433a9b [Fix] stringify: do not let allowEmptyArrays skip cycle detection (or dro...
• Additional commits viewable in compare view

Sourced from express's releases.

v4.22.2

What's Changed

• fix: restore >20 array parsing for req.query repeated keys (8d09bfe6)
  • This also unifies array-cap behavior across notations. Indexed notation (a[0]=...) was historically capped at qs's default arrayLimit of 20 even in older qs versions; after this change it also allows up to 1000 items.
• deps: qs@~6.15.1
• deps: body-parser@~1.20.5

New Contributors

• @​suuuuuuminnnnnn made their first contribution in expressjs/express#7021
• @​SAY-5 made their first contribution in expressjs/express#7181

Full Changelog: https://github.com/expressjs/express/compare/v4.22.1...v4.22.2

Sourced from express's changelog.

4.22.3

• Allow conditional revalidation for QUERY requests
  • req.fresh now includes QUERY in the freshness check, so QUERY responses can return 304 when a validator matches
• deps: qs@~6.16.0

4.22.2

• fix: restore >20 array parsing for req.query repeated keys (8d09bfe6)
  • This also unifies array-cap behavior across notations. Indexed notation (a[0]=...) was historically capped at qs's default arrayLimit of 20 even in older qs versions; after this change it also allows up to 1000 items.
• deps: qs@~6.15.1
• deps: body-parser@~1.20.5

• 899b524 4.22.3 (#7466)
• 1fad2c3 ci: add npm staged publication with dist-tag support (#7465)
• 4138650 deps: qs@~6.16.0 (#7440)
• 61ccf2e feat: allow conditional revalidation for QUERY requests (v4) (#7377)
• 715101b Update path-to-regexp to 0.1.13 because CVE-2026-4867 (#7135)
• f472e5f docs: fix the release date format for 4.22.2
• df0abc9 4.22.2
• 836d366 4.x update qs to 6.15.1, body-parser 1.20.5 (#7224)
• 8d09bfe fix: restore array parsing for req.query repeated keys (#7181)
• d39e8ad deps: body-parser@~1.20.4 (#7021)
• Additional commits viewable in compare view

This version was pushed to npm by GitHub Actions, a new releaser for express since your current version.