CVE-2026-115388
Medium · 6.2CVSS
6.2
EPSS
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Published
Oct 22, 2026
CISA due date
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The record
wasmtime-wasi-http in Wasmtime before 36.0.16, 37.0.0 before 48.0.3, and 49.0.0 before 49.0.1 does not enforce the wasi:io/streams check-write allowance for WASIp2 outgoing HTTP bodies, so oversized writes succeed instead of trapping. A malicious guest can pass large buffers to write on outgoing-body resources, holding host allocations for the store's lifetime and exhausting host memory.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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