CVE-2026-115393 (GCVE-0-2026-115393)
Vulnerability from cvelistv5
Published
2026-10-22 19:13
Modified
2026-10-22 19:13
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-787 - Out-of-bounds Write
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.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| bytecodealliance | wasmtime |
Version: 0 ≤ Version: 25.0.0 ≤ Version: 37.0.0 ≤ Version: 47.0.0 ≤ |
{
"containers": {
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"affected": [
{
"defaultStatus": "unaffected",
"packageURL": "pkg:cargo/wasmtime",
"product": "wasmtime",
"vendor": "bytecodealliance",
"versions": [
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"lessThan": "24.0.12",
"status": "affected",
"version": "0",
"versionType": "semver"
},
{
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"version": "24.0.12",
"versionType": "semver"
},
{
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"status": "affected",
"version": "25.0.0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "36.0.13",
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},
{
"lessThan": "46.0.2",
"status": "affected",
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"versionType": "semver"
},
{
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"version": "46.0.2",
"versionType": "semver"
},
{
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"versionType": "semver"
},
{
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"version": "47.0.3",
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}
]
}
],
"cpeApplicability": [
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"nodes": [
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},
{
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}
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}
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}
],
"datePublic": "2026-07-31T00:00:00.000Z",
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}
],
"metrics": [
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"baseScore": 1,
"baseSeverity": "LOW",
"privilegesRequired": "HIGH",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "PASSIVE",
"vectorString": "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",
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"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:L",
"version": "3.1"
},
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"problemTypes": [
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"descriptions": [
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"description": "Out-of-bounds Write",
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"providerMetadata": {
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"references": [
{
"name": "GitHub Security Advisory (GHSA-hgjw-h833-99q9)",
"tags": [
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],
"url": "https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-hgjw-h833-99q9"
},
{
"name": "VulnCheck Advisory: 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",
"tags": [
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"url": "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"
}
],
"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",
"x_generator": {
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"cveMetadata": {
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"assignerShortName": "VulnCheck",
"cveId": "CVE-2026-115393",
"datePublished": "2026-10-22T19:13:59.314Z",
"dateReserved": "2026-10-22T11:27:18.001Z",
"dateUpdated": "2026-10-22T19:13:59.314Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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