WebAssembly wabt up to 1.0.39 wasm-decompile wabt::AST::InsertNode memory corruption

Summaryinfo

A vulnerability classified as critical was found in WebAssembly wabt up to 1.0.39. This issue affects the function wabt::AST::InsertNode of the file /src/repro/wabt/bin/wasm-decompile of the component wasm-decompile. Such manipulation leads to memory corruption. This vulnerability is uniquely identified as CVE-2025-15411. Local access is required to approach this attack. Moreover, an exploit is present. 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.

Detailsinfo

A vulnerability was found in WebAssembly wabt up to 1.0.39 and classified as critical. Affected by this issue is the function wabt::AST::InsertNode of the file /src/repro/wabt/bin/wasm-decompile of the component wasm-decompile. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is confidentiality, integrity, and availability.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2025-15411. The exploitation is known to be easy. The attack needs to be approached locally. Technical details as well as a public exploit are known.

The exploit is available at github.com. It is declared as proof-of-concept. 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. The vulnerability scanner Nessus provides a plugin with the ID 281599 (Linux Distros Unpatched Vulnerability : CVE-2025-15411), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Tenable (281599) and EUVD (EUVD-2026-0006). Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

• WebAssembly

Name

• wabt

Version

• 1.0.0
• 1.0.1
• 1.0.2
• 1.0.3
• 1.0.4
• 1.0.5
• 1.0.6
• 1.0.7
• 1.0.8
• 1.0.9
• 1.0.10
• 1.0.11
• 1.0.12
• 1.0.13
• 1.0.14
• 1.0.15
• 1.0.16
• 1.0.17
• 1.0.18
• 1.0.19
• 1.0.20
• 1.0.21
• 1.0.22
• 1.0.23
• 1.0.24
• 1.0.25
• 1.0.26
• 1.0.27
• 1.0.28
• 1.0.29
• 1.0.30
• 1.0.31
• 1.0.32
• 1.0.33
• 1.0.34
• 1.0.35
• 1.0.36
• 1.0.37
• 1.0.38
• 1.0.39

Website

• Product: https://github.com/WebAssembly/wabt/

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Submitinfo

Accepted

• Submit #719825: WebAssembly wabt 1.0.39 and master-branch Heap-based Buffer Overflow (by Oneafter)

Duplicate

• Submit #XXXXXX: Xxxxxxxxxxx Xxxx X.x.xx Xxx Xxxxxx-xxxxxx Xxx Xxxxx Xxxx (by Oneafter)

Once again VulDB remains the best source for vulnerability data.

Discussion