Wasmtime 46.0.0 before 48.0.4 and 49.0.0 before 49.0.2 contains a denial-of-service vulnerability in its wasi:http implementation that allows guests to panic the host. Guests can specify a zero between-bytes-timeout request option, which is forwarded directly to a Tokio API that panics, crashing the host embedding.
{
"cna_assigner": "VulnCheck",
"cwe_ids": [
"CWE-1284"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/115xxx/CVE-2026-115382.json"
}{
"extracted_events": [
{
"range": [
{
"introduced": "46.0.0"
},
{
"fixed": "48.0.4"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
},
{
"range": [
{
"introduced": "49.0.0"
},
{
"fixed": "49.0.2"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
}
]
}