CVE-2026-115385
Medium
Description
Wasmtime 46.0.0 before 48.0.4 and 49.0.0 before 49.0.2 contains a denial of service vulnerability in the wasmtime-wasi WASIp3 implementation that allows guests to abort the Unix host process. Guests with mutable preopened directory access can call set-times or set-times-at with negative seconds timestamps before the epoch, triggering an assertion failure that crashes the host.
SeverityMedium
CVSS6.2
Exploit probability—
ProductBytecodealliance Wasmtime
PublishedOct 22, 2026
First seenOct 22, 2026
Weakness typeCWE-754CWE-754
How to fix
Update
- bytecodealliance wasmtime48.0.4, 49.0.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| bytecodealliance wasmtime | 46.0.0 ≤ v < 48.0.4, 49.0.0 ≤ v < 49.0.2 | 48.0.4, 49.0.2 |
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