What is CVE-2023-46332?

CVE-2023-46332 is a medium-severity vulnerability in Webassembly Binary Toolkit, classified under Out-of-bounds Write. CVSS score: 5.5/10. Published 2023-10-23.

How severe is CVE-2023-46332?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Buffer overflow in Webassembly Binary Toolkit

CVE-2023-46332

WebAssembly wabt 1.0.33 contains an Out-of-Bound Memory Write in DataSegment::Drop(), which lead to segmentation fault.

Vulnerability class: Buffer Overflow

Published 2023-10-23 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.003 (17.2th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 17th percentile — 17.2% 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 Binary Toolkit — versions 1.0.33

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

github.com/WebAssembly/wabt/issues/2311 (Exploit, Issue Tracking, Vendor Advisory)

Frequently asked questions

What is CVE-2023-46332?: CVE-2023-46332 is a medium-severity vulnerability in Webassembly Binary Toolkit, classified under Out-of-bounds Write. CVSS score: 5.5/10. Published 2023-10-23.
How severe is CVE-2023-46332?: Medium severity. CVSS v3 base score is 5.5 out of 10.