CVE-2026-119143

MediumCVSS 4.8/10Last modified Nov 4, 2026

Description

Wasmtime 46.0.0 before 48.0.6 and 49.0.0 before 49.0.3 contains a denial of service vulnerability that allows guest code to trigger a host panic through out-of-bounds zero-length stream operations. Malicious guests can perform zero-length component model stream reads or writes with unvalidated addresses, causing Direct{Source,Destination}::remaining to panic and crash WASIp3 embedders.

Metrics

CVSS 3.1 4.8/10CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-129

Affected software

No affected versions have been published.

Timeline

Published: Oct 29, 2026
Last modified: Nov 4, 2026
NVD status: Deferred

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