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CVE PROGRAM SOURCE RECORD5.9 Medium

CVE-2026-119140

Wasmtime 46.0.0 before 48.0.6 and 49.0.0 before 49.0.3 Host Panic via thread.yield

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

bytecodealliance wasmtime

Default version status: unaffected

  • 46.0.0 to < 48.0.6affected
  • 48.0.6unaffected
  • 49.0.0 to < 49.0.3affected
  • 49.0.3unaffected
pkg:cargo/wasmtime

References