Medium 5.3Published Dec 19, 2025

CVE-2025-14956WebAssembly Binaryen wasm-binary.cpp readExport heap-based overflow

Updated under an hour ago (Oct 28, 2026, 2:00 AM ET)

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It affects WebAssembly Binaryen. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for WebAssembly Binaryen

Exploited in the last 30 days

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: 5.3 MEDIUM (v3.1, CNA)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
Weakness (CWE): CWE-122, CWE-119
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulDB
NVD analysis: Modified
Record last updated: Feb 24, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

WebAssembly Binaryen webassembly:binaryen	125	CNA record
webassembly binaryen webassembly:binaryen	through 125	NVD

References

References

https://vuldb.com/?id.337592	vdb-entry, technical-description, third-party-advisory
https://vuldb.com/?ctiid.337592	signature, permissions-required, vdb-entry
https://vuldb.com/?submit.717315	third-party-advisory, exploit, vdb-entry
https://github.com/WebAssembly/binaryen/issues/8089	issue-tracking, exploit, third-party-advisory
https://github.com/WebAssembly/binaryen/pull/8092	issue-tracking
https://github.com/oneafter/1204/blob/main/hbf	exploit, not-applicable
https://github.com/WebAssembly/binaryen/commit/4f52bff8c4075b5630422f902dd92a0af2c9f398	patch
https://github.com/WebAssembly/binaryen/	product

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.