CVE-2026-119137 Wasmtime 42.0.0 before 48.0.6 and 49.0.0 before 49.0.3 Stack Overflow via Type Registry
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-119137?
CVE-2026-119137 is a medium-severity vulnerability in bytecodealliance wasmtime, published on 29 Oct 2026.
Official description
Wasmtime 42.0.0 before 48.0.6 and 49.0.0 before 49.0.3 contains a stack overflow vulnerability that allows guests to crash the host through recursive type drops. Guests can define a long chain of recursive types so that removing the top-level type triggers unbounded recursive drops, exhausting the host stack.
Weakness: CWE-674
Which versions are affected by CVE-2026-119137?
1 open source package ship an affected version, including wasmtime.
| Package | Affected | Fixed in |
|---|---|---|
wasmtime crates.io | From 42.0.0 | 48.0.6, 49.0.3 |
How do I fix CVE-2026-119137?
Upgrade wasmtime to a fixed version for your release line: 48.0.6 or 49.0.3.
Is CVE-2026-119137 being exploited?
There is no known exploitation of CVE-2026-119137 in the wild and no public exploit code.
Sources
Also known as GHSA-42v6-vp8p-fcjx, GHSA-wjc8-633q-pwxr, RUSTSEC-2026-0359.