Jackson Release 2.20.1

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Tatu Saloranta edited this page Oct 31, 2025 · 9 revisions

Patch version of 2.20, released October 30, 2025.

Following fixes are included in this patch release.

Changes, core

Streaming

#1473: Bug with Surrogates + Segments in the UTF8JsonGenerator

Databind

#5292: MapperFeature.FIX_FIELD_NAME_UPPER_CASE_PREFIX does not work with Constructor parameters

Changes, data formats

Avro

#601: Jackson subtype Avro schema unions are non-deterministic and therefore incompatible with each other

CBOR

#599: (cbor) Unable to deserialize stringref-enabled CBOR with ignored properties
#616: CBOR text gets truncated on decoding

Ion

#623: (ion) Upgrade ion-java dep to 1.11.11 (from 1.11.10)