What is CVE-2023-27115?

CVE-2023-27115 is a medium-severity vulnerability in Webassembly, classified under Improper Initialization. CVSS score: 5.5/10. Published 2023-03-10.

How severe is CVE-2023-27115?

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

Vulnerability in Webassembly

CVE-2023-27115

WebAssembly v1.0.29 was discovered to contain a segmentation fault via the component wabt::cat_compute_size.

Vulnerability class: Dirty Pipe (CVE-2022-0847)

Published 2023-03-10 · 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 (21.5th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 22nd percentile — 21.5% 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 — versions 1.0.29

Weakness classification (CWE)

CWE-665 — Improper Initialization

References

github.com/WebAssembly/wabt/issues/1938 (Exploit, Issue Tracking)
github.com/WebAssembly/wabt/issues/1992 (Exploit, Issue Tracking)

Frequently asked questions

What is CVE-2023-27115?: CVE-2023-27115 is a medium-severity vulnerability in Webassembly, classified under Improper Initialization. CVSS score: 5.5/10. Published 2023-03-10.
How severe is CVE-2023-27115?: Medium severity. CVSS v3 base score is 5.5 out of 10.