How many CVEs does WebAssembly have?

WebAssembly has 46 published CVE records since 2019, including 11 in the last two years.

How many WebAssembly CVEs are in CISA KEV?

None of WebAssembly's CVEs are currently listed in CISA's Known Exploited Vulnerabilities catalog.

Which WebAssembly products have the most CVEs?

The WebAssembly products with the most published CVEs are Binaryen, wabt, webassembly binary toolkit, webassembly, wasm.

What are the most common weakness types in WebAssembly CVEs?

WebAssembly's CVEs most often map to these CWE weakness types: CWE-125 (Out-of-bounds Read), CWE-476 (NULL Pointer Dereference), CWE-617 (Reachable Assertion), CWE-122 (Heap-based Buffer Overflow).

What is the average severity of WebAssembly CVEs?

The average CVSS base score across WebAssembly's scored CVEs is 5.8.

RadicalNotion.AI

Log in Start free

Log in

Log in Start free

46 CVEs

WebAssembly Vulnerabilities

Name: WebAssembly vulnerability dataset (CVEs)
Creator: RadicalNotion.AI
License: https://creativecommons.org/licenses/by-nc/4.0/

CVE security advisories and vulnerability history for WebAssembly.

46

Total CVEs

Published

0

In CISA KEV

Exploited in the wild

26

Public exploits

PoC or exploit code

5.8

Avg CVSS

2019–2026

Overview

WebAssembly has 46 published CVE records since 2019, of which 0 are in CISA's Known Exploited Vulnerabilities catalog and 26 have a known public exploit. The average CVSS base score across scored CVEs is 5.8.

This page aggregates every publicly disclosed vulnerability (CVE) affecting WebAssembly products, with severity breakdowns, the most-affected products, the most common weakness types, and the latest disclosures.

Security scorecard

A quick read on WebAssembly's vulnerability posture, as a share of its 46 published CVEs.

Average CVSS: 5.8
Critical / high: 13%
Actively exploited (KEV): 0%
Public exploit available: 57%
Patch available: 65%

Severity and exploitation

How the CVSS severity of WebAssembly's CVEs breaks down, plus how many are exploited in the wild or have public exploit code.

Critical0

High6

Medium38

Low2

In CISA’s Known Exploited Vulnerabilities catalog

0

None of WebAssembly's CVEs are currently listed in CISA's KEV catalog.

Public exploits

26

26 of WebAssembly's CVEs have a known public exploit available.

Most affected products

The WebAssembly products with the most published CVEs. Follow any product to browse its versions and vulnerabilities.

Common weakness types

The CWE weakness categories most often found in WebAssembly CVEs. Follow any weakness for its full explanation.

CNAs that assign these CVEs

The CVE Numbering Authorities that publish WebAssembly CVE records.

Disclosure activity by year

How many WebAssembly CVEs were published each year.

2019

12

2021

2

2022

10

2023

11

2025

8

2026

3

Latest WebAssembly CVEs

The most recently disclosed vulnerabilities affecting WebAssembly.

WebAssembly Binaryen BrOn wasm-ir-builder.cpp makeBrOn assertion
CWE-617
Medium · CVSS 4.8
EPSS 0.2%2026-05-11
WebAssembly wabt wasm-decompile VarName out-of-bounds
CWE-125
Medium · CVSS 4.8
EPSS 0.2%2026-01-01
WebAssembly wabt wasm-decompile InsertNode memory corruption
CWE-119
Medium · CVSS 4.8
EPSS 0.2%2026-01-01
WebAssembly Binaryen IRBuilder wasm-ir-builder.cpp makeLocalTee null pointer dereference
CWE-404
Medium · CVSS 4.8
EPSS 0.2%2025-12-19
WebAssembly Binaryen wasm-binary.cpp readExport heap-based overflow
CWE-119
Medium · CVSS 4.8
EPSS 0.2%2025-12-19
WebAssembly wabt binary-reader-interp.cc GetFuncOffset use after free
CWE-416
Medium · CVSS 4.8
EPSS 0.2%2025-06-19
WebAssembly wabt binary-reader-interp.cc OnDataCount resource consumption
CWE-400
Medium · CVSS 4.8
EPSS 0.2%2025-06-19
WebAssembly wabt binary-reader-objdump.cc LogOpcode assertion
CWE-617
Medium · CVSS 4.8
EPSS 0.2%2025-06-19
WebAssembly wabt binary-reader-interp.cc BeginFunctionBody null pointer dereference
CWE-476
Low · CVSS 2.3
EPSS 0.6%2025-04-02
WebAssembly wabt binary-reader-interp.cc GetReturnCallDropKeepCount heap-based overflow
CWE-122
Low · CVSS 2.3
EPSS 0.5%2025-03-21
WebAssembly wabt Malformed File binary-reader-interp.cc OnExport heap-based overflow
CWE-122
Medium · CVSS 5.3
EPSS 0.5%2025-03-17
Medium vulnerability · 2023-10-23
Medium · CVSS 5.5
EPSS 0.2%2023-10-23

Track new WebAssembly CVEs as they are disclosed and get AI-written analysis and remediation guidance.

Monitor WebAssembly CVEs

Other vendors

Browse vulnerabilities for other tracked vendors.

microsoft25,696 CVEs linux21,056 CVEs Google15,680 CVEs Apple14,957 CVEs Oracle11,815 CVEs Debian10,221 CVEs IBM8,381 CVEs Red Hat7,837 CVEs

Browse all vendors

Frequently asked questions

Common questions about WebAssembly vulnerabilities.

How many CVEs does WebAssembly have?: WebAssembly has 46 published CVE records since 2019, including 11 in the last two years.
How many WebAssembly CVEs are in CISA KEV?: None of WebAssembly's CVEs are currently listed in CISA's Known Exploited Vulnerabilities catalog.
Which WebAssembly products have the most CVEs?: The WebAssembly products with the most published CVEs are Binaryen, wabt, webassembly binary toolkit, webassembly, wasm.
What are the most common weakness types in WebAssembly CVEs?: WebAssembly's CVEs most often map to these CWE weakness types: CWE-125 (Out-of-bounds Read), CWE-476 (NULL Pointer Dereference), CWE-617 (Reachable Assertion), CWE-122 (Heap-based Buffer Overflow).
Are there public exploits for WebAssembly vulnerabilities?: Yes — 26 of WebAssembly's CVEs have a known public exploit.
What is the average severity of WebAssembly CVEs?: The average CVSS base score across WebAssembly's scored CVEs is 5.8.

References

Vulnerability data is sourced from the CVE Program; severity, KEV, and exploit signals are aggregated by RadicalNotion.AI.

Track WebAssembly vulnerabilities

Monitor new WebAssembly vulnerabilities as they are disclosed, with AI-written analysis and remediation guidance.

Start free See pricing