CVE-2025-15412

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.

CVSS 4.0

1.9CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

CVSS 3.1

7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

0.2% chance of exploitation in the next 30 days; higher than 10% of CVEs (scores of 2026-10-25)

CWEs

CWE-119, CWE-125

Published

2026-01-01

Modified

2026-10-07

Record from

the NVD, synced 2026-10-19

Affected

• webassembly:wabt

References

• https://github.com/WebAssembly/wabt/
• https://github.com/WebAssembly/wabt/issues/2678
• https://github.com/oneafter/1208/blob/main/af1
• https://vuldb.com/?ctiid.339333
• https://vuldb.com/?id.339333

Check your stackJSON