Jackson Release 3.1.3

Patch version of 3.1, under development as of April 2026.

Following fixes will be included in this patch release.

Changes, core

Streaming

• #1602: UTF8DataInputJsonParser needs to enforce StreamReadConstraints.maxNameLength limit

Databind

• #5898: DoubleDeserializer rejects "+INF"/"+Infinity" despite accepting "INF"/"Infinity" and "-INF"/"-Infinity"
• #5911: Deserialization failed with @JsonUnwrapped and @JsonAlias
• #5918: Creator properties always come first in 3.x
• #5923: Deserialization behavior change with Records, @JsonCreator and @JsonValue
• #5925: Pass dynamic serializer for Iterable content filtering
• #5931: Fix AtomicLongDeserializer value truncation on coerced values
• #5941: Jackson 3 MapperBuilder.addModule() is not recursive wrt declared Module dependencies

Changes, Other modules

Afterburner

• #343: Deserialization Failed when an unknown property is added in JSON when using Afterburner Module