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CVE-2026-115380 Details

ANALYZED

This CVE record has been analyzed and enriched by NVDAPI.com as an independent party.

Description

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.

Metrics

CVSS 3.x Severity and Vector Strings:

VolerionCVSS-B:5.5 MEDIUMVector:CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CNA: [email protected]CVSS-B:4 MEDIUMVector:CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-j366-h8gg-77pm	[email protected]	AdvisoryRemedyVendor
https://www.vulncheck.com/advisories/wasmtime-before-36.0.17-37.0.0-before-48.0.4-and-49.0.0-before-49.0.2-fuel-limit-bypass-dos-via-wasi-preview-0-poll-oneoff	[email protected]	Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-770	Allocation of Resources Without Limits or Throttling	[email protected]

Affected Products

Product	Versions
bytecodealliance Wasmtime	< 36.0.17 (semver) >= 37.0.0, < 48.0.4 (semver) >= 49.0.0, < 49.0.2 (semver)
CPE cpe:2.3:a:bytecodealliance:wasmtime::::::rust::* Remediation Upgrade: 36.0.17moderate effort Upgrade: 48.0.4moderate effort Upgrade: 49.0.2moderate effort Workaround:low effort Disable WASI preview 0 support in the CLI via '-Spreview0=n'.
bytecodealliance Wasmtime-wasi	< 36.0.17 (semver) >= 37.0.0, < 48.0.4 (semver) >= 49.0.0, < 49.0.2 (semver)
CPE No CPEs found in CPE dictionary for this product. Remediation Upgrade: 36.0.17moderate effort Upgrade: 48.0.4moderate effort Upgrade: 49.0.2moderate effort Workaround:low effort Disable WASI preview 0 support in the CLI via '-Spreview0=n'.

Change History

2 change records found show changes

Date	Action	Recorded By
Oct 26, 2026	CVE Modified	CISA-ADP
Oct 22, 2026	New CVE Received	[email protected]