CVE-2026-115393

Fixed in a distro release EPSS <1%CVSS 3.8

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.

Published 2026-10-22 · CVE record · OSV

Products: bytecodealliance wasmtime

Fixed upstream

Distro releases