CVE-2025-14956

MEDIUM 5.3

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

CVSS Score

5.3

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-122 CWE-119
Vendor	webassembly
Product	binaryen
Published	Dec 19, 2025
Last Updated	Feb 24, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

WebAssembly / Binaryen

125

References

NVD ↗ CVE.org ↗ EPSS Data ↗

vuldb.com: https://vuldb.com/?id.337592 vuldb.com: https://vuldb.com/?ctiid.337592 vuldb.com: https://vuldb.com/?submit.717315 github.com: https://github.com/WebAssembly/binaryen/issues/8089 github.com: https://github.com/WebAssembly/binaryen/pull/8092 github.com: https://github.com/oneafter/1204/blob/main/hbf github.com: https://github.com/WebAssembly/binaryen/commit/4f52bff8c4075b5630422f902dd92a0af2c9f398 github.com: https://github.com/WebAssembly/binaryen/

Credits

🔍 Oneafter (VulDB User)