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.

Metrics

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

Access Vector Local

Access Complexity Low

Authentication Single

Confidentiality Impact Partial

Integrity Impact Partial

Availability Impact Partial

This CVE is not in the KEV list.

The EPSS score is 0.00013.

Exploitation poc

Automatable no

Technical Impact partial

Affected Vendors & Products

Vendors Products
Webassembly Subscribe
Wabt Subscribe

Configuration 1 [-]

cpe:2.3:a:webassembly:wabt:*:*:*:*:*:*:*:*

No data.

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Vendors Products
Webassembly Subscribe
Wabt Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/WebAssembly/wabt/issues/2678 cve-icon cve-icon
https://github.com/oneafter/1208/blob/main/af1 cve-icon cve-icon
https://vuldb.com/?ctiid.339333 cve-icon cve-icon
https://vuldb.com/?id.339333 cve-icon cve-icon
https://vuldb.com/?submit.719826 cve-icon cve-icon
History

Tue, 06 Jan 2026 15:45:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:webassembly:wabt:*:*:*:*:*:*:*:*

Tue, 06 Jan 2026 00:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Mon, 05 Jan 2026 10:45:00 +0000

Type Values Removed Values Added
First Time appeared Webassembly
Webassembly wabt
Vendors & Products Webassembly
Webassembly wabt

Thu, 01 Jan 2026 20:45:00 +0000

Type Values Removed Values Added
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.
Title WebAssembly wabt wasm-decompile VarName out-of-bounds
Weaknesses CWE-119
CWE-125
References
Metrics cvssV2_0

{'score': 4.3, 'vector': 'AV:L/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR'}

cvssV3_0

{'score': 5.3, 'vector': 'CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R'}

cvssV3_1

{'score': 5.3, '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'}

cvssV4_0

{'score': 4.8, 'vector': '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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulDB

Published:

Updated: 2026-01-05T21:05:04.866Z

Reserved: 2026-01-01T09:19:01.354Z

Link: CVE-2025-15412

cve-icon Vulnrichment

Updated: 2026-01-05T21:04:58.339Z

cve-icon NVD

Status : Analyzed

Published: 2026-01-01T21:15:41.067

Modified: 2026-01-06T15:36:18.837

Link: CVE-2025-15412

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-01-05T10:14:24Z

Weaknesses