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.
Metrics
CVSS 3.1 7.8/10
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| WebAssembly | wabt | 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 |
References
- https://github.com/WebAssembly/wabt/
- https://github.com/WebAssembly/wabt/issues/2678Exploit, Issue Tracking, Vendor Advisory
- https://github.com/oneafter/1208/blob/main/af1Exploit
- https://vuldb.com/?ctiid.339333Permissions Required, VDB Entry
- https://vuldb.com/?id.339333Third Party Advisory, VDB Entry
- https://vuldb.com/?submit.719826Third Party Advisory, VDB Entry
Timeline
- Published
- Jan 1, 2026
- Last modified
- Oct 7, 2026
- NVD status
- Modified