---
cve: "CVE-2026-115393"
severity: "LOW"
cvss: 1.0
epss: ""
vendor: "bytecodealliance"
kev: false
exploited: false
published: "2026-10-22 19:17:47"
tags: [cve, security, low]
source: tsecurity.de CVE-Dossier
exported: "2026-10-25T15:07:28+01:00"
---

# CVE-2026-115393

> 1.0 LOW · 🧪 PoC

## Beschreibung

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.

## CNA-Record (Kanon, cvelistV5)

- CNA: **VulnCheck**
- State: PUBLISHED
- Stand: 2026-10-22 19:13:59
- CNA-CVSS: **1.0** (`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`)

## CVSS-Vektor

```
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
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Lokal | good |
| AC Komplexität | Hoch | good |
| PR Privilegien | Hoch | good |

## Schwachstellen-Klasse

- **CWE-787** — Out-of-bounds Write
  The product writes data past the end, or before the beginning, of the intended buffer.

## Patch verfügbar (OSV)

- 75662c3f090efb8f153ac1135077a85cb9aa2380 (Commit)
- f65ae51bc2527490a5cd8fde805ea9754b81be1f (Commit)

## Referenzen

- <https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-hgjw-h833-99q9>
- <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>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2026-115393/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_