CVE-2026-119131
Medium
Description
Wasmtime 46.0.0 before 48.0.6 and 49.0.0 before 49.0.3 contains a denial of service vulnerability in wasmtime-wasi-http that lets guests crash the host by sending long request URLs. Guests can use set-path-with-query with a '?' after byte 65535, overflowing a u16 index in the http crate and triggering a host panic.
SeverityMedium
CVSS5.3
Exploit probability—
ProductBytecodealliance Wasmtime
PublishedOct 29, 2026
First seenNov 4, 2026
Weakness typeCWE-190Integer overflow
How to fix
Update
- bytecodealliance wasmtime48.0.6, 49.0.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| bytecodealliance wasmtime | 46.0.0 ≤ v < 48.0.6, 49.0.0 ≤ v < 49.0.3 | 48.0.6, 49.0.3 |
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