CVE-2026-115384
CRITICAL
NVD
CVSS Score
9.9
Severity
CRITICAL
Published
Oct 22, 2026
Vendor
unknown
Description
Wasmtime 39.0.0 before 48.0.4 and 49.0.0 before 49.0.2 contains a stack buffer overflow vulnerability that allows malicious guests to write ~16KB to the native stack via unvalidated async callback result types. Attackers can supply components with mistyped component-model-async callback functions to overwrite return addresses, crashing the host or escaping the sandbox.