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.
References (6)
Core 6
Core References
Third Party Advisory, VDB Entry vdb-entry
technical-description
https://vuldb.com/?id.339333
Permissions Required, VDB Entry signature
permissions-required
https://vuldb.com/?ctiid.339333
Third Party Advisory, VDB Entry third-party-advisory
https://vuldb.com/?submit.719826
Exploit, Issue Tracking, Vendor Advisory issue-tracking
https://github.com/WebAssembly/wabt/issues/2678
Various Sources product
https://github.com/WebAssembly/wabt/
Scores
CVSS v3
5.3
EPSS
0.0003
EPSS Percentile
7.3%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-119
CWE-125
Status
published
Products (1)
webassembly/wabt
< 1.0.39
Published
Jan 01, 2026
Tracked Since
Feb 18, 2026