CVE-2026-115393
Low · 3.8CVSS
3.8
EPSS
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Published
Oct 22, 2026
CISA due date
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The record
Wasmtime before 24.0.12, 25.0.0 before 36.0.13, 37.0.0 before 46.0.2, and 47.0.0 before 47.0.3 contains a type confusion vulnerability because several Store APIs fail to validate that objects belong to the Store's Engine. Embedders mixing objects between Engines via Instance::new, StructRefPre::new, or Tag::new can trigger trampoline signature mismatches causing out-of-bounds stack writes, GC heap corruption, or panics.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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