Issues

• wasm2c: 4 GiB memory sizes truncate to 0 on 32-bit hosts (heap overflow, use-after-free)

  WebAssembly/wabt#2873 · Filter by author ilyas-mallah opened on Oct 9, 2026

• Zero-sized literal output buffers cause out-of-bounds access

  WebAssembly/wabt#2851 · Filter by author Sn0wyDay opened on Sep 9, 2026

• Custom section (before …)/(after …) placement is parsed but ignored

  WebAssembly/wabt#2834 · Filter by author uwezkhan opened on Aug 24, 2026

• Should libwabt.js and libwabt.wasm be published on npm?

  WebAssembly/wabt#2827 · Filter by author WebReflection opened on Aug 17, 2026
  4

• Port wasm2c to binaryen

  WebAssembly/wabt#2753 · Filter by author lexi-nadia opened on Jun 1, 2026
  6

• wat2wasm/wast2json: assertion failure (!IsReferenceWithIndex()) parsing a typed reference in a GC struct/array field

  WebAssembly/wabt#2750 · Filter by author WTCYJ opened on Jun 1, 2026
  1

• [Security] Out-of-bounds write in MakeTypeBindingReverseMapping via unchecked local_index from the binary name section

  WebAssembly/wabt#2749 · Filter by author LuiginoC opened on May 28, 2026
  2

• OOB read in wabt Interpreter Binary Reader

  WebAssembly/wabt#2747 · Filter by author LuiginoC opened on May 27, 2026

• Heap Buffer OOB Write in wabt MakeTypeBindingReverseMapping

  WebAssembly/wabt#2743 · Filter by author arthurscchan opened on Apr 28, 2026

• heap OOB read / SEGV in BinaryWriter::WriteExpr

  WebAssembly/wabt#2742 · Filter by author DavidKorczynski opened on Apr 25, 2026

• [wasm-interp] incorrect semantics in table.grow

  WebAssembly/wabt#2734 · Filter by author sbaesdg opened on Mar 31, 2026

• table.set index truncation

  WebAssembly/wabt#2733 · Filter by author sbaesdg opened on Mar 31, 2026

• table.get index truncation for table64

  WebAssembly/wabt#2732 · Filter by author sbaesdg opened on Mar 31, 2026

• table.fill index truncation for table64

  WebAssembly/wabt#2731 · Filter by author sbaesdg opened on Mar 31, 2026

• incorrect table.copy in mixed table index types

  WebAssembly/wabt#2730 · Filter by author sbaesdg opened on Mar 31, 2026

• incorrect memory.copy in mixed memory index types

  WebAssembly/wabt#2729 · Filter by author sbaesdg opened on Mar 31, 2026

• wat2wasm demo seems a little outdated

  WebAssembly/wabt#2711 · Filter by author Sainan opened on Feb 27, 2026
  2

• Incorrect Index Validation for Recursive Function Types

  WebAssembly/wabt#2710 · Filter by author Q1IQ opened on Feb 26, 2026

• Incorrect Type Index Validation for Implicit Function Signatures

  WebAssembly/wabt#2709 · Filter by author Q1IQ opened on Feb 26, 2026

• https://webassembly.github.io/wabt/ 404?

  WebAssembly/wabt#2682 · Filter by author 0wwafa opened on Jan 14, 2026
  1

• Official release binaries build without WASI support?

  WebAssembly/wabt#2680 · Filter by author hartwork opened on Dec 19, 2025

• [Bug] Heap-buffer-overflow in wabt::AST::InsertNode within wasm-decompile

  sanitizer failureswasm-decompile
  WebAssembly/wabt#2679 · Filter by author oneafter opened on Dec 8, 2025
  2

• [Bug] Segmentation Fault (SEGV) in wabt::Decompiler::VarName within wasm-decompile

  sanitizer failureswasm-decompile
  WebAssembly/wabt#2678 · Filter by author oneafter opened on Dec 8, 2025
  3

• [Bug] Assertion failed false in wabt::Decompiler::DecompileExpr

  wasm-decompile
  WebAssembly/wabt#2677 · Filter by author oneafter opened on Dec 5, 2025
  1

• [Bug] Assertion failed type.IsReferenceWithIndex() in wabt::convertRefNullToRef

  wasm-decompile
  WebAssembly/wabt#2675 · Filter by author oneafter opened on Dec 5, 2025
  1