Issues

• BeanToArray writer and SupportArrayToBean reader disagree on field order for @JSONType(alphabetic=false) beans

  alibaba/fastjson2#7882 · Filter by author wenshao opened on Oct 4, 2026

• Code review and javadoc improvements

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

• [BUG] JVM crash (SIGSEGV): Fnv.hashCode64(byte[], int, int, boolean) reads past the end of the input array

  bug
  alibaba/fastjson2#7872 · Filter by author lexand opened on Sep 24, 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] JSON.toJSON() 序列化同一泛型类不同参数时复用被污染的 ObjectWriter 缓存，抛 ClassCastException（Boolean cannot be cast to X）

  bug
  alibaba/fastjson2#7853 · Filter by author yuwensg 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

• [QUESTION]找不到fastjson2-extension-spring6 2.0.64 的包

  question
  alibaba/fastjson2#7840 · Filter by author CNwxp 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

• [BUG]ArrayIndexOutOfBoundsException in skipComment() on a truncated multi-line comment

  bug
  alibaba/fastjson2#7825 · Filter by author Namron2000 opened on Aug 25, 2026

• [BUG] \x escape indexes DIGITS2 without bounds checking — JSON.parse("\"\\xzz\"") throws AIOOBE

  bug
  alibaba/fastjson2#7810 · Filter by author Namron2000 opened on Aug 24, 2026

• [BUG] ArrayIndexOutOfBoundsException on a field name ending in a backslash — JSON.parse("{\"\\")

  bug
  alibaba/fastjson2#7809 · Filter by author Namron2000 opened on Aug 24, 2026

• [BUG] ArrayIndexOutOfBoundsException on a truncated exponent — JSON.parse("1e")

  bug
  alibaba/fastjson2#7807 · Filter by author Namron2000 opened on Aug 24, 2026

• [BUG]从2.0.61版本开始，使用JSONB类的toBytes方法报错

  bug
  alibaba/fastjson2#7806 · Filter by author binaryworms opened on Aug 24, 2026
  2

• [BUG] 等价 JSON 数值转 boolean 时结果依赖书写形式并静默降级

  bug
  alibaba/fastjson2#7803 · Filter by author annoymous3 opened on Aug 22, 2026