Issues

• [BUG]兼容层api smartcase不一致:jsonobj.tojavaobject(type) 等泛型

  bug
  alibaba/fastjson2#7913 · Filter by author zhengjiezxxy opened on Oct 19, 2026

• [BUG] 兼容层api对bytes行为不一致:v1 base64，兼容bytes

  bug
  alibaba/fastjson2#7909 · Filter by author zhengjiezxxy opened on Oct 18, 2026
  1

• [BUG]兼容层api对于共享list输出ref（v1没有）

  bug
  alibaba/fastjson2#7908 · Filter by author zhengjiezxxy opened on Oct 18, 2026

• Numeric enum equality differs between members and validated values

  alibaba/fastjson2#7904 · Filter by author hutiefang76 opened on Oct 18, 2026

• Schema exports lose constraints and anyOf object roundtrips throw

  alibaba/fastjson2#7903 · Filter by author hutiefang76 opened on Oct 18, 2026

• JSONSchema ignores enum constraints for explicit non-string types

  alibaba/fastjson2#7902 · Filter by author hutiefang76 opened on Oct 18, 2026

• [BUG] ObjectReaderProvider.hashCache 没有任何清除路径：旧 ClassLoader 被缓存的 reader 钉住，cleanup(ClassLoader) 不生效

  bug
  alibaba/fastjson2#7896 · Filter by author lvqa13 opened on Oct 16, 2026

• JSON Schema uniqueItems misses equal numbers / uniqueItems 漏检等价数值

  alibaba/fastjson2#7892 · Filter by author king-wwwhhh opened on Oct 15, 2026

• [BUG] 兼容层json.parse解析为null

  bug
  alibaba/fastjson2#7887 · Filter by author zhengjiezxxy opened on Oct 12, 2026
  1

• 配置 AutoTypeBeforeHandler 白名单（未开已废弃的 SupportAutoType）时，解析「POJO 的 Map 字段带容器 @type」抛 JSONException: expect ':'

  bug
  alibaba/fastjson2#7886 · Filter by author lvqa13 opened on Oct 12, 2026
  1

• Code review and javadoc improvements

  alibaba/fastjson2#7879 · Filter by author landawn opened on Oct 1, 2026

• [BUG]升级fastjson2之后，序列化生成大量class，导致Metaspace OOM

  bug
  alibaba/fastjson2#7871 · Filter by author YangGuanQun opened on Sep 23, 2026

• [GLD Serializer Benchmark] Java fastjson2 2.0.57 — spec compliance misses

  alibaba/fastjson2#7868 · Filter by author leo-gan opened on Sep 14, 2026

• [BUG] fastjson2 短字段名 hash 快路径的 Unsafe 8 字节读取在缓冲区末尾附近存在越界读取

  bug
  alibaba/fastjson2#7865 · Filter by author annoymous3 opened on Sep 12, 2026

• [BUG]IOUtils在使用JIT会出现解析错误

  bug
  alibaba/fastjson2#7863 · Filter by author myspace1024 opened on Sep 12, 2026

• [BUG] fastjson2.0.65版本使用JSONB报错，Cannot invoke "java.lang.Enum.ordinal()" because "e" is null

  bug
  alibaba/fastjson2#7862 · Filter by author binaryworms opened on Sep 11, 2026
  1

• [BUG] JSONSchema silently fails to resolve forward references in $defs (loses validation rules depending on key order)

  alibaba/fastjson2#7855 · Filter by author imvs opened on Sep 4, 2026

• [BUG]

  bug
  alibaba/fastjson2#7851 · Filter by author allenliushaohua opened on Sep 4, 2026

• 1.x security backport gap (commit ad353ff71 missing acceptNameSet + URL char rejection)

  alibaba/fastjson2#7849 · Filter by author DenceChen opened on Sep 3, 2026
  1

• [BUG]TypeUtils.castToJavaBean对Boolean支持的问题

  bug
  alibaba/fastjson2#7842 · Filter by author Hugh1029 opened on Sep 2, 2026

• [BUG]Caused by: com.alibaba.fastjson2.JSONException: expect ':', but 55, offset 2, character ", line 1, column 2, fastjson-version 2.0.64 {"message_id":5777,"message_type":"platform.status.logout","message_source":"pcg","push_time":"2026-08-28T09:47:24

  bug
  alibaba/fastjson2#7839 · Filter by author boxingdidi opened on Sep 2, 2026
  2

• [BUG]2.0.64 + JDK8(aarch64)：合法 {"flag":false} 循环 parseObject 报 syntax error : f；toJSONString 截断字符串

  bug
  alibaba/fastjson2#7838 · Filter by author GJSH opened on Aug 31, 2026

• [BUG] 2.0.64 序列化带 @JsonFormat(shape = STRING) 的 BigDecimal 时生成非法 JSON

  bug
  alibaba/fastjson2#7837 · Filter by author innocent886 opened on Aug 31, 2026

• [BUG] aarch64 + JDK8 写路径数字丢失：IOUtils.writeInt3 的非对齐 UNSAFE.putLong 被 C2 误编译

  alibaba/fastjson2#7828 · Filter by author Jiandev opened on Aug 26, 2026

• [BUG] ArrayIndexOutOfBoundsException` on a field name followed by trailing whitespace

  bug
  alibaba/fastjson2#7826 · Filter by author Namron2000 opened on Aug 25, 2026