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Jackson Release 2.21.2

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Tatu Saloranta edited this page Mar 20, 2026 · 9 revisions

Patch version of 2.21, released on February 20, 2026.

Following fixes are included in this patch release.

Changes, core

Streaming

  • #1541: Unexpected Illegal surrogate character when parsing field names
  • #1570: Fail parsing from DataInput if StreamReadConstraints.getMaxDocumentLength() set [GHSA-2m67-wjpj-xhg9]

Databind

  • #5729: ISO-8601 change prevents parsing negative timestamps (dates before 1970)
  • #5814: Enum deserialization does not respect JsonFormat.Feature.ACCEPT_CASE_INSENSITIVE_VALUES override

Changes, data formats

CSV

  • #615: Feature CsvReadFeature.EMPTY_UNQUOTED_STRING_AS_NULL ignored

Changes, JVM Languages

Kotlin

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