CVE-2025-14957

What it is

A vulnerability was identified in WebAssembly Binaryen up to 125. This affects the function IRBuilder::makeLocalGet/IRBuilder::makeLocalSet/IRBuilder::makeLocalTee of the file src/wasm/wasm-ir-builder.cpp of the component IRBuilder. Such manipulation of the argument Index leads to null pointer dereference. Local access is required to approach this attack. The exploit is publicly available and might be used. The name of the patch is 6fb2b917a79578ab44cf3b900a6da4c27251e0d4. Applying a patch is advised to resolve this issue.

At a glance

Exploitability

Can be exploited locally on the machine with a low-privilege account. Limited direct impact.

Exploit odds

0.2% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2025-12-19 17:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 08:36 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 0.2% in the next 30 days (EPSS).
• Severity: 1.9 LOW (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2025-12-19 17:15 UTC

Last modified

2026-06-17 08:36 UTC

Exploit probability

0.2% · EPSS, next 30 days

Weakness

CWE-404

Record status

Modified

Affected

• Webassembly Binaryen ≤ 125

Attack profile CVSS 4.0 · 1.9

Attack vector

Local

Complexity

Low

Attack requirements

None

Privileges needed

Low

User interaction

None

Confidentiality

None

Integrity

None

Availability

Low

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2025-14957.md and follow it. Check whether this project is affected by CVE-2025-14957. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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