CVE-2025-14956

MEDIUM

WebAssembly Binaryen < 125 - Heap-Based Buffer Overflow in WasmBinaryReader::readExport

Title source: llm
STIX 2.1

Description

A vulnerability was determined in WebAssembly Binaryen up to 125. Affected by this issue is the function WasmBinaryReader::readExport of the file src/wasm/wasm-binary.cpp. This manipulation causes heap-based buffer overflow. It is possible to launch the attack on the local host. The exploit has been publicly disclosed and may be utilized. Patch name: 4f52bff8c4075b5630422f902dd92a0af2c9f398. It is recommended to apply a patch to fix this issue.

References (8)

Core 8
Core References
Third Party Advisory, VDB Entry vdb-entry technical-description
https://vuldb.com/?id.337592
Permissions Required, VDB Entry signature permissions-required
https://vuldb.com/?ctiid.337592
Exploit, Third Party Advisory, VDB Entry third-party-advisory
https://vuldb.com/?submit.717315
Exploit, Issue Tracking, Third Party Advisory issue-tracking
https://github.com/WebAssembly/binaryen/issues/8089

Scores

CVSS v3 5.3
EPSS 0.0018
EPSS Percentile 7.8%
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 none
Automatable no
Technical Impact partial

Details

CWE
CWE-119 CWE-122 CWE-125
Status published
Products (1)
webassembly/binaryen < 125
Published Dec 19, 2025
Tracked Since Feb 18, 2026