Out-of-Bounds Read Vulnerability in WebAssembly wabt Affects User Security
CVE-2025-15412

4.8MEDIUM

Key Information:

Vendor

Webassembly

Status
Wabt
Vendor
CVE Published:
1 January 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-15412?

A vulnerability has been identified in the WebAssembly wabt toolchain, specifically in the function wabt::Decompiler::VarName located in the wasm-decompile component. This vulnerability allows for an out-of-bounds read attack, requiring local access to exploit. Given that the project currently lacks an active maintainer, concerns about timely patching of this security flaw are heightened. The issue has been publicized, and there are indications that the community may need to contribute to resolving it through direct submissions.

Affected Version(s)

wabt 1.0.0

wabt 1.0.1

wabt 1.0.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2025-15412 - Proof of Concept

References

https://vuldb.com/?id.339333
vdb-entrytechnical-description
https://vuldb.com/?ctiid.339333
signaturepermissions-required
https://vuldb.com/?submit.719826
third-party-advisory

CVSS V4

Score:
4.8
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Oneafter (VulDB User)
JSON
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CVE-2025-15412 : Out-of-Bounds Read Vulnerability in WebAssembly wabt Affects User Security