CVE-2023-27116

WebAssembly v1.0.29 discovered to contain an abort in CWriter::MangleType.

5.5 MediumFix available

WebAssembly v1.0.29 discovered to contain an abort in CWriter::MangleType.

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: Low
Privileges needed: None
User interaction: Required

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: High

Exploit likelihood

0.29%Up 0.2 points since Mar 10, 2023

What each source reports

NVD Score used 5.5

WebAssembly v1.0.29 discovered to contain an abort in CWriter::MangleType.

Record: CVE-2023-27116
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-02

CVE List No score

WebAssembly v1.0.29 discovered to contain an abort in CWriter::MangleType.

Record: CVE-2023-27116
Updated: 2026-11-02

EUVDEUVD-2023-30900 0.0

WebAssembly v1.0.29 discovered to contain an abort in CWriter::MangleType.

Record: EUVD-2023-30900
CVSS: 0.0 NoneCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-02

GitHub AdvisoriesGHSA-whc2-2q67-xmxj 5.5

WebAssembly v1.0.29 discovered to contain an abort in CWriter::MangleType.

WebAssembly v1.0.29 discovered to contain an abort in CWriter::MangleType.

Record: GHSA-whc2-2q67-xmxj
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVDEBIAN-CVE-2023-27116 5.5

WebAssembly v1.0.29 discovered to contain an abort in CWriter::MangleType.

Record: DEBIAN-CVE-2023-27116
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVUBUNTU-CVE-2023-27116 5.5

WebAssembly v1.0.29 discovered to contain an abort in CWriter::MangleType.

Record: UBUNTU-CVE-2023-27116
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSV No score

WebAssembly v1.0.29 discovered to contain an abort in CWriter::MangleType.

Record: CVE-2023-27116
Updated: 2026-11-02

Affected products

webassembly

Affected packages

Affected packages
Package	Affected	Fixed
`wabt` Debian:12	All versions, plus listed versions 1.0.32-11.0.33-11.0.34+dsfg+~cs1.0.32-11.0.34+dsfg2+~cs1.0.32-11.0.34+dsfg2+~cs1.0.32-2 Show 9 moreShow less 1.0.34+dsfg2+~cs1.0.32-31.0.34+dsfg2+~cs1.0.32-41.0.34-11.0.36+dfsg+~cs1.0.36-11.0.36+dfsg+~cs1.0.36-21.0.41+dfsg+~cs1.0.39-11.0.41+dfsg+~cs1.0.39-21.0.42+dfsg+~cs1.0.39-11.0.42+dfsg+~cs1.0.39-2	None known
`wabt` Debian:13	before 1.0.33-1	1.0.33-1
`wabt` Debian:14	before 1.0.33-1	1.0.33-1
`wabt` Ubuntu:20.04:LTS	All versions, plus listed versions 1.0.11-11.0.12-11.0.13-11.0.13-1build1	None known
`wabt` Ubuntu:22.04:LTS	All versions, plus listed versions 1.0.20-11.0.24-11.0.24-21.0.25-11.0.26-11.0.27-1	None known

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2023-27116 is a medium vulnerability (CVSS 5.5) in Webassembly, published March 10, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.29%, the 21st percentile. Fixed in wabt 1.0.33-1.

References

Show 5 moreShow less