---
id: CVE-2025-15411
title: A weakness has been identified in WebAssembly wabt up to 1.0.39
summary: >-
  A weakness has been identified in WebAssembly wabt up to 1.0.39. This
  vulnerability affects the function wabt::AST::InsertNode of the file
  /src/repro/wabt/bin/wasm-decompile of the component wasm-decompile. This
  manipulation causes memor…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L'
cwe:
  - CWE-119
vendor: webassembly
product: wabt
affected:
  - wabt <= 1.0.39
published: '2026-01-01'
updated: '2026-10-01'
sourceUpdated: '2026-10-01T08:10:00.183'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-15411'
references:
  - url: 'https://github.com/WebAssembly/wabt/'
    label: cna@vuldb.com
  - url: 'https://github.com/WebAssembly/wabt/issues/2679'
    label: cna@vuldb.com
  - url: 'https://github.com/oneafter/1208/blob/main/af1'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/?ctiid.339332'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/?id.339332'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/?submit.719825'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/?submit.736404'
    label: cna@vuldb.com
tags:
  - nvd
epss: 0.00208
epssPercentile: 0.09743
ingestedAt: '2026-10-01T08:40:11.726Z'
---

## Overview

A weakness has been identified in WebAssembly wabt up to 1.0.39. This vulnerability affects the function wabt::AST::InsertNode of the file /src/repro/wabt/bin/wasm-decompile of the component wasm-decompile. This manipulation causes memory corruption. It is possible to launch the attack on the local host. The exploit has been made available to the public and could be used for attacks. Unfortunately, the project has no active maintainer at the moment. In a reply to the issue report somebody recommended to the researcher to provide a PR himself.

## Affected

- `wabt <= 1.0.39`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.