CVE-2026-115382
Wasmtime 46.0.0 before 48.0.4 and 49.0.0 before 49.0.2 wasi:http Zero Timeout Panic DoS
CVSS Score
4.8
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-1284 |
| Vendor | bytecodealliance |
| Product | wasmtime |
| Published | Oct 22, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
bytecodealliance / wasmtime
46.0.0 < 48.0.4 49.0.0 < 49.0.2
References
Credits
🔍 smaeljaish771 KeenSecurityLab