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.
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Affected Vendors & Products
Advisories
No advisories yet.
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
Thu, 29 Oct 2026 16:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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 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. | |
| Title | Wasmtime 46.0.0 before 48.0.6 and 49.0.0 before 49.0.3 Host Panic via thread.yield | |
| First Time appeared |
Bytecodealliance
Bytecodealliance wasmtime |
|
| Weaknesses | CWE-372 | |
| CPEs | cpe:2.3:a:bytecodealliance:wasmtime:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Bytecodealliance
Bytecodealliance wasmtime |
|
| References |
| |
| Metrics |
cvssV3_1
|
Projects
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Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-10-29T15:58:19.800Z
Reserved: 2026-10-29T14:28:41.594Z
Link: CVE-2026-119140
No data.
Status : Deferred
Published: 2026-10-29T16:18:07.520
Modified: 2026-10-29T16:18:07.630
Link: CVE-2026-119140
No data.
OpenCVE Enrichment
Updated: 2026-10-29T22:30:12Z
Weaknesses