CVE-2025-14956

Name: CVE-2025-14956
Creator: NVD / NIST
Published: 2025-12-19T17:15:51.47+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 1.9/10EPSS 0.18%

Last modified Jun 17, 2026

CVE-2025-14956 is a low-severity vulnerability rated 1.9/10 on the CVSS scale. 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. EPSS estimates a 0.18% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.1/10

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

CVSS 4.0

1.9/10

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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.18%

7.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Webassembly	Binaryen	<= 125

References

https://github.com/WebAssembly/binaryen/
https://github.com/WebAssembly/binaryen/commit/4f52bff8c4075b5630422f902dd92a0af2c9f398Patch
https://github.com/WebAssembly/binaryen/issues/8089Exploit, Issue Tracking, Third Party Advisory
https://github.com/WebAssembly/binaryen/pull/8092Issue Tracking
https://github.com/oneafter/1204/blob/main/hbfNot Applicable
https://vuldb.com/?ctiid.337592Permissions Required, VDB Entry
https://vuldb.com/?id.337592Third Party Advisory, VDB Entry
https://vuldb.com/?submit.717315Exploit, Third Party Advisory, VDB Entry

Timeline

Published: Dec 19, 2025
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2025-14956?

How severe is CVE-2025-14956?

CVE-2025-14956 has a CVSS score of 1.9/10 (LOW severity). The EPSS model estimates a 0.18% probability of exploitation in the next 30 days.

How do I fix CVE-2025-14956?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-14956?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST