#VU125757 Incorrect calculation in Wasmtime - CVE-2026-34946

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Main Vulnerability Database Vulnerabilities #VU125757

#VU125757 Incorrect calculation in Wasmtime - CVE-2026-34946

Published: April 10, 2026


Vulnerability identifier: #VU125757
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-34946
CWE-ID: CWE-682
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Wasmtime
Software vendor:
Bytecode Alliance

Description

The vulnerability allows a remote user to cause a denial of service.

The vulnerability exists due to incorrect table indexing in the Winch compiler when compiling the table.fill instruction. A remote user can compile a valid guest that uses table.fill to cause a denial of service.

User interaction is required to process the crafted guest.


Remediation

Install security update from vendor's website.

External links