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.
References (7)
Core 7
Core References
Permissions Required, VDB Entry third-party-advisory
https://vuldb.com/?submit.736404
Various Sources product
https://github.com/WebAssembly/wabt/
Third Party Advisory, VDB Entry vdb-entry
technical-description
https://vuldb.com/?id.339332
Permissions Required, VDB Entry signature
permissions-required
https://vuldb.com/?ctiid.339332
Third Party Advisory, VDB Entry third-party-advisory
https://vuldb.com/?submit.719825
Exploit, Issue Tracking, Vendor Advisory issue-tracking
https://github.com/WebAssembly/wabt/issues/2679
Scores
CVSS v3
5.3
EPSS
0.0004
EPSS Percentile
11.8%
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
Status
published
Products (1)
webassembly/wabt
< 1.0.39
Published
Jan 01, 2026
Tracked Since
Feb 18, 2026