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CVE-2025-15412— WebAssembly wabt wasm-decompile VarName out-of-bounds

Quick assessment

Affected
WebAssembly wabt
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WebAssembly wabt是WebAssembly开源的一个WebAssembly二进制工具包。 WebAssembly wabt 1.0.39及之前版本存在缓冲区错误漏洞，该漏洞源于wasm-decompile组件文件/src/repro/wabt/bin/wasm-decompile中wabt::Decompiler::VarName函数存在越界读取，可能导致本地攻击。

CVSS 5.3 · Medium EPSS 0.20% · P10

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution
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I. Basic Information for CVE-2025-15412

Vulnerability Information
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Vulnerability Title
WebAssembly wabt wasm-decompile VarName out-of-bounds
Source: CVE Program / CVE List V5
Vulnerability Description
A security vulnerability has been detected in WebAssembly wabt up to 1.0.39. This issue affects the function wabt::Decompiler::VarName of the file /src/repro/wabt/bin/wasm-decompile of the component wasm-decompile. Such manipulation leads to out-of-bounds read. Local access is required to approach this attack. The exploit has been disclosed publicly and may be used. 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
WebAssembly wabt 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WebAssembly wabt是WebAssembly开源的一个WebAssembly二进制工具包。 WebAssembly wabt 1.0.39及之前版本存在缓冲区错误漏洞，该漏洞源于wasm-decompile组件文件/src/repro/wabt/bin/wasm-decompile中wabt::Decompiler::VarName函数存在越界读取，可能导致本地攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
WebAssembly wabt 1.0.0 cpe:2.3:a:webassembly:wabt:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2025-15412

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III. Intelligence Information for CVE-2025-15412

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Vendor Advisories for CVE-2025-15412 (3)

Other References for CVE-2025-15412 (2)

IV. Related Vulnerabilities

Same product: wabt
Same vendor: WebAssembly
Same weakness: CWE-125

V. Comments for CVE-2025-15412

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