CVE-2026-115383 Wasmtime 47.0.0 before 48.0.4 and 49.0.0 before 49.0.2 GC Heap Corruption via Tag Imports

Wasmtime 47.0.0 before 48.0.4 and 49.0.0 before 49.0.2 contains an improper validation vulnerability that accepts components whose core modules import WebAssembly tags with a subtype of the original type. Malicious guests can mis-type exception object payloads to corrupt the GC heap, causing...

CVE-2026-115383

The Wasmtime runtime versions 47.0.0 before 48.0.4 and 49.0.0 before 49.0.2 are vulnerable to an improper validation flaw. The issue arises when core modules import WebAssembly tags with a subtype of the original type. This allows malicious guests to mis-type exception object payloads , leading t...