CVE-2026-115389
LOW
NVD
CVSS Score
2.3
Severity
LOW
Published
Oct 22, 2026
Vendor
unknown
Description
Wasmtime before 36.0.16, 37.0.0 before 48.0.3, and 49.0.0 before 49.0.1 does not adequately account for host allocations when lifting guest values through the dynamically-typed Val API, bypassing the hostcall fuel limit. A malicious WebAssembly guest can return crafted values that allocate at least ~100x more host memory than tracked, causing denial of service.