What’s Vulnerable › Vulnerabilities

CVE-2025-15411: WebAssembly wabt wasm-decompile InsertNode memory corruption

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-01-01 · updated 2026-10-07
• Weakness: CWE-119

Description

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 products

• WebAssembly wabt: through 1.0.39

References

• https://github.com/WebAssembly/wabt/
• https://github.com/WebAssembly/wabt/issues/2679
• https://github.com/oneafter/1208/blob/main/af1
• https://vuldb.com/?ctiid.339332
• https://vuldb.com/?id.339332
• https://vuldb.com/?submit.719825
• https://vuldb.com/?submit.736404

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