Jackson Release 3.0.4

Patch version of 3.0, released on January 21, 2026.

This will likely be the last patch release from 3.0 branch.

Following fixes are included in this patch release.

Changes, core

Streaming

• #1516: UTF8StreamJsonParser sometimes may cause ArrayIndexOutOfBoundsException

Databind

• #1288: (regression in 3.0.0) Type id not exposed for JsonTypeInfo.As.EXTERNAL_PROPERTY even when visible set to true
• #2580: Regression with External type id / Build deserialization in 3.0
• #4742: (regression in 3.0.0) Deserialization with Builder, External type id, @JsonCreator failing
• #5481: JsonMapper.Builder.modules(...) ignores changes after build() due to internal saveState

Changes, data formats

CBOR

• #640: CBOR throws ArrayIndexOutOfBoundsException with long ASCII text

XML

• #793: XmlSerializationContext: NPE _writeCapabilities not set for SerializationContext