Vulnerabilities

Wasmtime 46.0.0 before 48.0.6 and 49.0.0 before 49.0.3 contains a denial of service vulnerability that allows malicious components to panic the host…

Wasmtime 46.0.0 before 48.0.6 and 49.0.0 before 49.0.3 contains a denial of service vulnerability that allows malicious components to panic the host via thread.yield in start functions. Attackers can supply a component whose start function calls an async-lowered import then thread.yield, causing an undisposed fiber drop that crashes embedders.

Read at NIST National Vulnerability Database (CVE API 2.0)

Vendor

Bytecodealliance

Product

wasmtime

CVSS v3.1

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

Weakness

CWE-372

NVD status

Deferred

• NIST National Vulnerability Database (CVE API 2.0) (nvd.nist.gov)
• CVE-2026-119140 on this site · NVD · CVE.org · Vulnpedia

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1. 7
   CVE NVD 7d ago

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   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…

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