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Vulnerability · Published Jan 1, 2026 · Assigned by VulDB

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

Medium 5.3

In plain English

A medium-severity out-of-bounds read in wabt from WebAssembly. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 11% of all known vulnerabilities).

Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.2%top 89.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12wabtno fix listedDEBIAN-CVE-2025-15412
Debian:13wabtno fix listedDEBIAN-CVE-2025-15412
Debian:14wabtno fix listedDEBIAN-CVE-2025-15412
Ubuntu:22.04:LTSwabtno fix listedUBUNTU-CVE-2025-15412
Ubuntu:24.04:LTSwabtno fix listedUBUNTU-CVE-2025-15412
Ubuntu:25.10wabtno fix listedUBUNTU-CVE-2025-15412
Ubuntu:26.04:LTSwabtno fix listedUBUNTU-CVE-2025-15412
Ubuntu:26.10wabtno fix listedUBUNTU-CVE-2025-15412

Affected products (as reported)

VendorProductVersions
WebAssembly wabt 1.0.01.0.11.0.21.0.31.0.41.0.51.0.61.0.7

Weakness: CWE-125, CWE-119 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

References