CVE-2026-115380: Wasmtime before 36.0.17, 37.0.0 before 48.0.4, and 49.0.0 before 49.0.2 contains a denial of service vulnerability in the wasmtime-wasi WASI preview 0…

PriorityP416medium4CVSS 3.1

AVLACLPRNUINSUCNINAL

Wasmtime before 36.0.17, 37.0.0 before 48.0.4, and 49.0.0 before 49.0.2 contains a denial of service vulnerability in the wasmtime-wasi WASI preview 0 poll_oneoff adapter, which performs O(n) host work per subscription without consuming or checking fuel. Malicious guest modules can pass many subscriptions to force long-running host computation that ignores configured fuel limits.

Affected

3 ranges

Vendor	Product	Version range	Fixed in
bytecodealliance	wasmtime	< 36.0.17	36.0.17
bytecodealliance	wasmtime	>= 37.0.0 < 48.0.4	48.0.4
bytecodealliance	wasmtime	>= 49.0.0 < 49.0.2	49.0.2

CVSS provenance

nvdv3.14.0MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

nvdv4.05.1MEDIUMCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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