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 contains a type confusion vulnerability because several Store…

PriorityP415low3.8CVSS 3.1

AVLACHPRHUIRSUCLILAL

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

4 ranges

Vendor	Product	Version range	Fixed in
bytecodealliance	wasmtime	< 24.0.12	24.0.12
bytecodealliance	wasmtime	>= 25.0.0 < 36.0.13	36.0.13
bytecodealliance	wasmtime	>= 37.0.0 < 46.0.2	46.0.2
bytecodealliance	wasmtime	>= 47.0.0 < 47.0.3	47.0.3

CVSS provenance

nvdv3.13.8LOWCVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:L

nvdv4.01.0LOWCVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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