What is CVE-2022-43281?

CVE-2022-43281 is a high-severity vulnerability in Webassembly Wasm, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2022-10-28.

How severe is CVE-2022-43281?

High severity. CVSS v3 base score is 7.8 out of 10.

Buffer overflow in Webassembly Wasm

CVE-2022-43281

wasm-interp v1.0.29 was discovered to contain a heap overflow via the component std::vector<wabt::Type, std::allocator<wabt::Type>>::size() at /bits/stl_vector.h.

Vulnerability class: Buffer Overflow

Published 2022-10-28 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.003 (23.2th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 23rd percentile — 23.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Webassembly Wasm — versions 1.0.29

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

github.com/WebAssembly/wabt/issues/1981 (Exploit, Patch, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2022-43281?: CVE-2022-43281 is a high-severity vulnerability in Webassembly Wasm, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2022-10-28.
How severe is CVE-2022-43281?: High severity. CVSS v3 base score is 7.8 out of 10.