CVE-2026-115393 (GCVE-0-2026-115393)

Vulnerability from cvelistv5 – Published: 2026-10-22 19:13 – Updated: 2026-10-22 19:13
VLAI
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.
Severity
1 (Low)
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
3.8 (Low)
CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:L
CWE
Assigner
VulnCheck CNA under the mitre root
CNA scorecard B 84/100 over 6762 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
bytecodealliance wasmtime Affected: 0 , < 24.0.12 (semver)
Unaffected: 24.0.12 (semver)
Affected: 25.0.0 , < 36.0.13 (semver)
Unaffected: 36.0.13 (semver)
Affected: 37.0.0 , < 46.0.2 (semver)
Unaffected: 46.0.2 (semver)
Affected: 47.0.0 , < 47.0.3 (semver)
Unaffected: 47.0.3 (semver)
    cpe:2.3:a:bytecodealliance:wasmtime:*:*:*:*:*:*:*:*
    cpe:2.3:a:bytecodealliance:wasmtime:*:*:*:*:*:*:*:*
    cpe:2.3:a:bytecodealliance:wasmtime:*:*:*:*:*:*:*:*
    cpe:2.3:a:bytecodealliance:wasmtime:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-07-31 00:00
Show details on NVD website
To clipboard 

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          "name": "GitHub Security Advisory (GHSA-hgjw-h833-99q9)",
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          "url": "https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-hgjw-h833-99q9"
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        }
      ],
      "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",
  "vulnerability-lookup:meta": {
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        "lastModified": "2026-10-22T19:17:47.150",
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                "Recovery": "NOT_DEFINED",
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                "modifiedPrivilegesRequired": "NOT_DEFINED",
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      "cve": "CVE-2026-115393",
      "id": "CVE-2026-115393",
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      "product_status:known_affected": "4",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "wasmtime: wasmtime: Memory corruption via cross-engine object validation failure",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-115393.json",
      "version": "3"
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  }
}



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