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.
Affected products
webassembly: wabt
References7
- github.com/WebAssembly/wabt/issues/2679 ExploitIssue TrackingVendor Advisory
- github.com/oneafter/1208/blob/main/af1 Exploit
- github.com/WebAssembly/wabt/
- vuldb.com/?ctiid.339332 Permissions RequiredVDB Entry
- vuldb.com/?id.339332 Third Party AdvisoryVDB Entry
- vuldb.com/?submit.719825 Third Party AdvisoryVDB Entry
- vuldb.com/?submit.736404
Metrics
- CVSS 3.1
-
7.8
HIGH
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - CVSS 4.0
-
1.9
LOW
Score source: CNA
CVSS: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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - EPSS — exploit probability
- 0% percentile: 11 · as of 11 November 2026
- CWE
- CWE-119
Could this be exploited in your environment?
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