CVE-2026-115393

EUVD-2026-108327
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
VulnCheckCNA
3.8 LOW
LOCAL
HIGH
HIGH
CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:L
Base Score
CVSS 3.x
EPSS Score
Percentile: 0.48%
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
bytecodealliancewasmtime
𝑥
< 24.0.12
CNA
bytecodealliancewasmtime
25.0.0 ≤
𝑥
< 36.0.13
CNA
bytecodealliancewasmtime
37.0.0 ≤
𝑥
< 46.0.2
CNA
bytecodealliancewasmtime
47.0.0 ≤
𝑥
< 47.0.3
CNA
Debian logo
Debian Releases
Debian Product
Codename
rust-wasmtime
forky
36.0.13+dfsg-1
fixed
sid
36.0.13+dfsg-1
fixed
trixie
vulnerable
Common Weakness Enumeration
References
https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-hgjw-h833-99q9
https://www.vulncheck.com/advisories/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