CVE-2025-14956CWE-119CWE-122

WebAssembly Binaryen wasm-binary.cpp readExport heap-based overflow

Medium · published December 19, 2025

CVSS v4.0
4.8
EPSS
0%
Percentile
11.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
4.8 · MEDIUM
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
EPSS
0.00215 · 11.3th percentile
Weaknesses
CWE-119 · Improper Restriction of Operations within the Bounds of a Memory Buffer; CWE-122 · Heap-based Buffer Overflow
Published
2025-12-19T16:32Z
EPSS history
Timeline
  • 19 DEC 16:32Z
    WebAssembly Binaryen wasm-binary.cpp readExport heap-based overflow
    cvelistv5