CVE-2026-119140
MEDIUMDescription
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.
How to fix
No published remediation has been found for this vulnerability's affected products yet.
Mitigation guidance may be in the linked vendor advisories in the References section below.
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CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H
Exploit Intelligence
EPSS data unavailable for this CVE.
References
Related Vulnerabilities
Other CWE-372 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2021-25735 | Medium | 6.5 | 5.4% | - | Fix |
| CVE-2023-31127 | Critical | 9.0 | 0.9% | - | Fix |
| CVE-2020-27222 | High | 7.5 | 0.9% | - | - |
| CVE-2024-22590 | Critical | 9.1 | 0.6% | - | - |
| CVE-2026-84897 | Medium | 5.3 | 0.5% | - | Fix |
| CVE-2023-4012 | High | 7.5 | 0.4% | - | Fix |
Common questions
How do I fix CVE-2026-119140?
No published fix for CVE-2026-119140 has been found yet. Check the linked vendor advisories for guidance as it becomes available.
How severe is CVE-2026-119140?
CVE-2026-119140 has a CVSS v3 base score of 4.8, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
Embed a live status badge for CVE-2026-119140
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-10-29.