CVE-2026-119138 Wasmtime 46.0.0 before 48.0.6 and 49.0.0 before 49.0.3 Panic After Trap
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-119138?
CVE-2026-119138 is a medium-severity vulnerability in bytecodealliance wasmtime, published on 29 Oct 2026.
Official description
Wasmtime 46.0.0 before 48.0.6 and 49.0.0 before 49.0.3 contains a denial of service vulnerability that allows pending calls to trigger an assertion failure after a trap poisons the Store. Attackers supplying misbehaving guest code can cause a trap and let earlier calls proceed, crashing embedders that continue using the inconsistent Store.
Weakness: CWE-617
Which versions are affected by CVE-2026-119138?
1 open source package ship an affected version, including wasmtime.
| Package | Affected | Fixed in |
|---|---|---|
wasmtime crates.io | From 46.0.0 | 48.0.6, 49.0.3 |
How do I fix CVE-2026-119138?
Upgrade wasmtime to a fixed version for your release line: 48.0.6 or 49.0.3.
Is CVE-2026-119138 being exploited?
There is no known exploitation of CVE-2026-119138 in the wild and no public exploit code.
Sources
Also known as GHSA-5vwq-v85g-fcqv, GHSA-hmwq-g22x-qjw5, RUSTSEC-2026-0361.