CVE-2026-115392 Wasmtime before 24.0.13, 25.0.0 before 36.0.14, 37.0.0 before 46.0.3, and 47.0.0 before 47.0.4 allows a filesystem sandbox escape in wasmtim
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-115392?
CVE-2026-115392 is a high-severity vulnerability in bytecodealliance wasmtime, published on 22 Oct 2026.
Official description
Wasmtime before 24.0.13, 25.0.0 before 36.0.14, 37.0.0 before 46.0.3, and 47.0.0 before 47.0.4 allows a filesystem sandbox escape in wasmtime-wasi because its cap-std dependency mishandles symlinks with trailing slashes on macOS and Linux kernels lacking openat2. A guest with write access to any sandboxed directory can read and write any host-accessible file, and read-only guests may read host files via preexisting symlinks.
Weakness: CWE-61
Which versions are affected by CVE-2026-115392?
1 open source package ship an affected version, including wasmtime.
| Package | Affected | Fixed in |
|---|---|---|
wasmtime crates.io | From 0.0.0-0 | 24.0.13, 36.0.14, 46.0.3, 47.0.4 |
How do I fix CVE-2026-115392?
Upgrade wasmtime to a fixed version for your release line: 24.0.13, 36.0.14, 46.0.3 or 47.0.4.
Is CVE-2026-115392 being exploited?
There is no known exploitation of CVE-2026-115392 in the wild and no public exploit code.
Sources
Also known as AZL-111068, DEBIAN-CVE-2026-115392, GHSA-gxhv-gf3j-vwqc, GHSA-vqjp-4c8c-hfgg, RUSTSEC-2026-0269, UBUNTU-CVE-2026-115392.