Low
Wasmtime before 24.0.12, 25.0.0 before 36.0.13, 37.0.0 before 46.0.2, and 47.0.0 before 47.0.3 Cross-Engine Type Confusion
Type: advisorySources: OSV
Wasmtime before 24.0.12, 25.0.0 before 36.0.13, 37.0.0 before 46.0.2, and 47.0.0 before 47.0.3 contains a type confusion vulnerability because several Store APIs fail to validate that objects belong to the Store's Engine. Embedders mixing objects between Engines via Instance::new, StructRefPre::new, or Tag::new can trigger trampoline signature mismatches causing out-of-bounds stack writes, GC heap corruption, or panics.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-115393
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 4 Nov 2026, 13:23 UTC · Revision 1
Source evidence
Wasmtime before 24.0.12, 25.0.0 before 36.0.13, 37.0.0 before 46.0.2, and 47.0.0 before 47.0.3 Cross-Engine Type Confusion
core-osv · Original sourcePublished 22 Oct 2026, 19:13 UTC
Wasmtime before 24.0.12, 25.0.0 before 36.0.13, 37.0.0 before 46.0.2, and 47.0.0 before 47.0.3 contains a type confusion vulnerability because several Store APIs fail to validate that objects belong to the Store's Engine. Embedders mixing objects between Engines via Instance::new, StructRefPre::new, or Tag::new can trigger trampoline signature mismatches causing out-of-bounds stack writes, GC heap corruption, or panics.
osv:CVE-2026-115393
Complete source record
{
"id": "91cc64652634c68150c765995d537894d6386689fe591714ea326f14af53c8b9",
"url": "https://osv.dev/vulnerability/CVE-2026-115393",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Wasmtime before 24.0.12, 25.0.0 before 36.0.13, 37.0.0 before 46.0.2, and 47.0.0 before 47.0.3 Cross-Engine Type Confusion",
"summary": "Wasmtime before 24.0.12, 25.0.0 before 36.0.13, 37.0.0 before 46.0.2, and 47.0.0 before 47.0.3 contains a type confusion vulnerability because several Store APIs fail to validate that objects belong to the Store's Engine. Embedders mixing objects between Engines via Instance::new, StructRefPre::new, or Tag::new can trigger trampoline signature mismatches causing out-of-bounds stack writes, GC heap corruption, or panics.",
"evidence": "osv:CVE-2026-115393",
"products": [],
"severity": "low",
"structured": {
"id": "CVE-2026-115393",
"aliases": [
"CVE-2026-115393",
"GHSA-hgjw-h833-99q9",
"RUSTSEC-2026-0222"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/bytecodealliance/wasmtime",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "75662c3f090efb8f153ac1135077a85cb9aa2380"
},
{
"introduced": "0b195ef5db76c02fb5392ec1418c58bdc5537d41"
},
{
"fixed": "f65ae51bc2527490a5cd8fde805ea9754b81be1f"
},
{
"introduced": "7b3d6ae79e9153a2477668062f5622c10333925f"
},
{
"fixed": "4f87260abb0b64a6f0654a396551240edd270b71"
},
{
"introduced": "39d67168cdb6911ffdc961381314b6fed62e3c93"
},
{
"fixed": "5554cc1a651da536af2cc46c7324bdc085b162e3"
}
],
"database_specific": {
"extracted_events": [
{
"range": [
{
"introduced": "0"
},
{
"fixed": "24.0.12"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
},
{
"range": [
{
"introduced": "25.0.0"
},
{
"fixed": "36.0.13"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
},
{
"range": [
{
"introduced": "37.0.0"
},
{
"fixed": "46.0.2"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
},
{
"range": [
{
"introduced": "47.0.0"
},
{
"fixed": "47.0.3"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
}
]
}
}
],
"versions": [
"v46.0.1",
"v47.0.2",
"v36.0.12",
"v24.0.11",
"v47.0.1",
"v47.0.0",
"v36.0.11",
"v24.0.10",
"v46.0.0",
"v24.0.9",
"v36.0.10",
"v36.0.9",
"v24.0.8",
"v36.0.8",
"v36.0.7",
"v24.0.7",
"v36.0.6",
"v24.0.6",
"v36.0.5",
"dev",
"v36.0.4",
"v24.0.5",
"v36.0.3",
"v36.0.2",
"v24.0.4",
"v36.0.1",
"v36.0.0",
"v24.0.3",
"v24.0.2",
"v24.0.1",
"v24.0.0",
"v0.35.0",
"v0.33.0",
"v0.34.0",
"v0.32.0",
"v0.31.0",
"v0.30.0",
"v0.29.0",
"v0.28.0",
"v0.27.0",
"v0.26.0",
"v0.25.0",
"v0.24.0",
"v0.23.0",
"v0.22.0",
"cranelift-v0.69.0",
"v0.21.0",
"v0.20.0",
"v0.19.0",
"v0.18.0",
"v0.17.0",
"v0.16.0",
"cranelift-v0.61.0",
"cranelift-v0.60.0",
"v0.12.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-115393.json"
}
}
],
"modified": "2026-10-31T02:30:46.299924784Z",
"provider": "osv",
"references": [
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/115xxx/CVE-2026-115393.json",
"https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-hgjw-h833-99q9",
"https://nvd.nist.gov/vuln/detail/CVE-2026-115393",
"https://www.vulncheck.com/advisories/wasmtime-before-24.0.12-25.0.0-before-36.0.13-37.0.0-before-46.0.2-and-47.0.0-before-47.0.3-cross-engine-type-confusion"
],
"provider_metadata": {
"cwe_ids": [
"CWE-787"
],
"cna_assigner": "VulnCheck",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/115xxx/CVE-2026-115393.json"
}
},
"related_cves": [
{
"value": "CVE-2026-115393",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 503023,
"published_at": "2026-10-22T19:13:59.314+00:00"
}