CVE-2025-14956

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.

CVSS v3.1 Score

5.3

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

Weakness Type (CWE)

CWE-119 Buffer Overflow

CWE-122 CWE-122

CWE-125 Out-of-bounds Read

Affected Products

Vendor	Product	Versions
webassembly	binaryen	< 125

References

Advisories & Patches

https://github.com/WebAssembly/binaryen/commit/4f52bff8c4075b5630422f902dd92a0af2c9f398

Exploits

https://github.com/WebAssembly/binaryen/issues/8089 https://vuldb.com/?submit.717315

Other References

https://github.com/WebAssembly/binaryen/ https://github.com/WebAssembly/binaryen/pull/8092 https://github.com/oneafter/1204/blob/main/hbf https://vuldb.com/?ctiid.337592 https://vuldb.com/?id.337592

Frequently Asked Questions

What is CVE-2025-14956? +

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. It has a CVSS v3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2025-14956? +

CVE-2025-14956 has a CVSS v3.1 score of 5.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-14956? +

CVE-2025-14956 affects products from webassembly, specifically: binaryen. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-14956? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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