{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-115892",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-10-23T19:37:27.176Z",
        "datePublished": "2026-10-23T21:26:54.528Z",
        "dateUpdated": "2026-10-23T21:26:54.528Z"
    },
    "containers": {
        "cna": {
            "title": "Wasmtime: Panic lowering a host-created component model stream into a guest that expects a different payload type",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-843",
                            "lang": "en",
                            "description": "CWE-843: Access of Resource Using Incompatible Type ('Type Confusion')",
                            "type": "CWE"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-248",
                            "lang": "en",
                            "description": "CWE-248: Uncaught Exception",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "attackVector": "NETWORK",
                        "attackComplexity": "HIGH",
                        "attackRequirements": "PRESENT",
                        "privilegesRequired": "HIGH",
                        "userInteraction": "PASSIVE",
                        "vulnConfidentialityImpact": "NONE",
                        "vulnIntegrityImpact": "NONE",
                        "vulnAvailabilityImpact": "HIGH",
                        "subConfidentialityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "subAvailabilityImpact": "NONE",
                        "baseScore": 5.7,
                        "baseSeverity": "MEDIUM",
                        "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
                        "version": "4.0"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-9pvw-hwfg-92h5",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-9pvw-hwfg-92h5"
                },
                {
                    "name": "https://github.com/bytecodealliance/wasmtime/pull/14819",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/bytecodealliance/wasmtime/pull/14819"
                },
                {
                    "name": "https://github.com/bytecodealliance/wasmtime/pull/14820",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/bytecodealliance/wasmtime/pull/14820"
                },
                {
                    "name": "https://github.com/bytecodealliance/wasmtime/pull/14827",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/bytecodealliance/wasmtime/pull/14827"
                },
                {
                    "name": "https://github.com/bytecodealliance/wasmtime/commit/222ff3a65dab9aa7011f8c246937751a0bac5abd",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/bytecodealliance/wasmtime/commit/222ff3a65dab9aa7011f8c246937751a0bac5abd"
                },
                {
                    "name": "https://github.com/bytecodealliance/wasmtime/commit/48dacc76241f06088e79f3ce1b17642f2f7bf158",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/bytecodealliance/wasmtime/commit/48dacc76241f06088e79f3ce1b17642f2f7bf158"
                },
                {
                    "name": "https://github.com/bytecodealliance/wasmtime/commit/994549891c8a706cb4f2809f9d17b9f67b31e618",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/bytecodealliance/wasmtime/commit/994549891c8a706cb4f2809f9d17b9f67b31e618"
                },
                {
                    "name": "https://github.com/bytecodealliance/wasmtime/releases/tag/v48.0.7",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/bytecodealliance/wasmtime/releases/tag/v48.0.7"
                },
                {
                    "name": "https://github.com/bytecodealliance/wasmtime/releases/tag/v49.0.4",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/bytecodealliance/wasmtime/releases/tag/v49.0.4"
                }
            ],
            "affected": [
                {
                    "vendor": "bytecodealliance",
                    "product": "wasmtime",
                    "versions": [
                        {
                            "version": ">= 46.0.0, < 48.0.7",
                            "status": "affected"
                        },
                        {
                            "version": ">= 49.0.0, < 49.0.4",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-10-23T21:26:54.528Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Wasmtime is a runtime for WebAssembly. From 46.0.0 until 48.0.7 and 49.0.4, lowering a host-created component-model stream or future into a guest can omit a required payload-type check after the value passes through guest code and returns through StreamAny, FutureAny, Val::Stream, Val::Future, or an equivalent typed reader. A malicious guest that controls exported function types or returned values can cause the host to pass the type-erased value to a guest expecting a different payload type, which panics the Wasmtime host. This issue is fixed in versions 48.0.7 and 49.0.4."
                }
            ],
            "source": {
                "advisory": "GHSA-9pvw-hwfg-92h5",
                "discovery": "UNKNOWN"
            }
        }
    }
}