Jackson Release 3.1.6

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

Following fixes will be included in this patch release.

Changes, core

Streaming

• #1630: UTF8StreamJsonParser.nextName() ignores JsonReadFeature.ALLOW_LEADING_DECIMAL_POINT_FOR_NUMBERS

Databind

None

Changes, dataformats

Protobuf

• #708: Proto3 fields without label fail to parse
• #714: Packed repeated field fails to decode when array spans an input buffer reload
• #715: ProtobufGenerator._reportWrongWireType() always reports string, ignoring actual type

Smile

• #720: SmileGenerator writes past output buffer (ArrayIndexOutOfBoundsException) for very long Strings due to int overflow in maxLen