Issues

• Add lookup-then-resolve helper for dynamic serializers in StdDynamicSerializer/StdContainerSerializer

  FasterXML/jackson-databind#6449 · Filter by author cowtowncoder opened on Nov 15, 2026

• EnumSet serializers re-resolved for every value: dynamic serializer maps never hit for EnumSet subclasses

  3.4enum
  FasterXML/jackson-databind#6447 · Filter by author cowtowncoder opened on Nov 15, 2026 · 3.4.0
  1

• JsonMerge does not work properly for EnumMap

  to-evaluate
  FasterXML/jackson-databind#6445 · Filter by author shevek opened on Nov 14, 2026
  1

• Specification Compliance Misses

  FasterXML/jackson-databind#6442 · Filter by author leo-gan opened on Nov 14, 2026
  4

• @JsonUnwrapped value with EXTERNAL_PROPERTY type id silently deserialized as null (or misleading unknown-property error)

  FasterXML/jackson-databind#6421 · Filter by author cowtowncoder opened on Nov 11, 2026

• @JsonValue ignores name filters on the enclosing property

  FasterXML/jackson-databind#6418 · Filter by author fudianchn opened on Nov 9, 2026
  2

• StdConvertingSerializer looks up and contextualizes delegate serializer for every value when converter output type is dynamic

  3.x
  FasterXML/jackson-databind#6395 · Filter by author cowtowncoder opened on Nov 3, 2026

• Record update with readerForUpdating() passes existing values to wrong parameters for non-canonical @JsonCreator

  FasterXML/jackson-databind#6383 · Filter by author shinseongsu opened on Nov 2, 2026
  

• @JsonIgnoreType not honored for Creator properties (including Record components)

  3.4
  FasterXML/jackson-databind#6361 · Filter by author aysha-afrah26 opened on Oct 31, 2026

• Self-referencing type with property-level @JsonIdentityInfo: nested value misses settings applied later in resolve()

  3.4
  FasterXML/jackson-databind#6359 · Filter by author cowtowncoder opened on Oct 31, 2026 · 3.4.0
  2

  

• BeanPropertyMap.replace() does not update alias-matched properties: uncontextualized deserializers used for recursive types with @JsonAlias

  3.x
  FasterXML/jackson-databind#6353 · Filter by author cowtowncoder opened on Oct 30, 2026

• ZonedDateTime loses information about zone id (Default Value Change for 4.x?)

  4.xdate-time-config
  FasterXML/jackson-databind#6348 · Filter by author huxi opened on Oct 29, 2026
  6

• @JsonValue has lower precedence than module Serializers for container and container-like types

  3.4
  FasterXML/jackson-databind#6341 · Filter by author cowtowncoder opened on Oct 28, 2026

• Publish Github Releases

  to-evaluate
  FasterXML/jackson-databind#6340 · Filter by author xtianhill opened on Oct 27, 2026
  2

• Support simpler and easier streaming parsing for nested objects

  to-evaluate
  FasterXML/jackson-databind#6330 · Filter by author zhujianxintian opened on Oct 25, 2026
  7

• Malformed JSON (or failure) for a single-element container whose only element is filtered with APPLY_JSON_INCLUDE_FOR_CONTAINERS + WRITE_SINGLE_ELEM_ARRAYS_UNWRAPPED

  FasterXML/jackson-databind#6299 · Filter by author Marti2203 opened on Oct 18, 2026

• @JsonIgnoreProperties/@JsonIncludeProperties ignore non-String Map keys when serializing

  FasterXML/jackson-databind#6282 · Filter by author kdelay opened on Oct 15, 2026

• @JsonView should allow the same property to have different types

  FasterXML/jackson-databind#6272 · Filter by author fabzzap opened on Oct 10, 2026
  2

• Support @JsonView for @JsonAnySetter deserialization

  3.4
  FasterXML/jackson-databind#6260 · Filter by author cowtowncoder opened on Oct 1, 2026

• ACCEPT_CASE_INSENSITIVE_PROPERTIES not applied to @JsonUnwrapped properties

  FasterXML/jackson-databind#6247 · Filter by author cowtowncoder opened on Sep 29, 2026

• @JacksonInject(useInput = OptBoolean.FALSE) ignored for Field and Setter properties

  FasterXML/jackson-databind#6201 · Filter by author aysha-afrah26 opened on Sep 9, 2026
  3

• Add opt-in failure for duplicate elements when deserializing JSON arrays into Set types

  FasterXML/jackson-databind#6177 · Filter by author dpkass opened on Aug 27, 2026
  1

• Support conditional type ID inclusion during deserialization

  to-evaluate
  FasterXML/jackson-databind#6147 · Filter by author westinrm opened on Aug 7, 2026
  1

• @JsonIgnoreProperties bypassed for Creator properties with builders and external type ids

  FasterXML/jackson-databind#6145 · Filter by author aysha-afrah26 opened on Aug 6, 2026
  1

• Jackson 3 requires a public visibility for an implicit long-argument delegating constructor, but not for the equivalent String one (Jackson 2 accepts both as private)

  works-as-intended
  FasterXML/jackson-databind#6144 · Filter by author itineric opened on Aug 5, 2026
  2