CVE-2026-119138

Medium

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 pending calls to trigger an assertion failure after a trap poisons the Store. Attackers supplying misbehaving guest code can cause a trap and let earlier calls proceed, crashing embedders that continue using the inconsistent Store.

SeverityMedium

CVSS4.8

Exploit probability—

ProductBytecodealliance Wasmtime

PublishedOct 29, 2026

First seenNov 4, 2026

Weakness typeCWE-617CWE-617

How to fix

Update

bytecodealliance wasmtime48.0.6, 49.0.3 or later

Vendor advisories

github.com/bytecodealliance/wasmtime/security/advisories/GHSA-hmwq-g22x-qjw5

Affected products

Product	Affected versions	Fixed in
bytecodealliance wasmtime	46.0.0 ≤ v < 48.0.6, 49.0.0 ≤ v < 49.0.3	48.0.6, 49.0.3

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