CVE-2026-126408
EUVD-2026-12503513.11.2026, 10:17
Wasmtime 47.0.0 before 48.0.8, 49.0.0 before 49.0.5, and 50.0.0 before 50.0.1 contains an insufficient type-check in the TypedFunc embedder API for I31, Option<I31>, and Option<NoneRef> parameter or result types, reaching an unreachable!() path. A malicious guest module exporting a function that uses another anyref-hierarchy type can panic the host embedding, causing denial of service.Enginsight
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources
(CNA/ADP records, vendor advisories, Enginsight analysis).
| Vendor | Product | Version | Source |
|---|---|---|---|
| bytecodealliance | wasmtime | 47.0.0 ≤ 𝑥 < 48.0.8 | CNA |
| bytecodealliance | wasmtime | 49.0.0 ≤ 𝑥 < 49.0.5 | CNA |
| bytecodealliance | wasmtime | 50.0.0 ≤ 𝑥 < 50.0.1 | CNA |
Ubuntu Releases
Common Weakness Enumeration