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CVE-2026-115393

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 Cross-Engine Type Confusion PUBLISHED

Description (CNA)

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 (CNA)

Vendor / productVersions
bytecodealliance / wasmtimeaffected 0 before 24.0.12; unaffected 24.0.12; affected 25.0.0 before 36.0.13; unaffected 36.0.13; affected 37.0.0 before 46.0.2; unaffected 46.0.2; affected 47.0.0 before 47.0.3; unaffected 47.0.3

CWE

CWE-787

References