---
cve: "CVE-2026-63632"
severity: "LOW"
cvss: 3.3
epss: "0.2%"
vendor: "onnx"
kev: false
exploited: false
published: "2026-08-18 14:55:15"
tags: [cve, security, low]
source: tsecurity.de CVE-Dossier
exported: "2026-09-21T09:25:11+02:00"
---

# CVE-2026-63632

> 3.3 LOW · 🧪 PoC

## Beschreibung

Open Neural Network Exchange (ONNX) is an open standard for machine learning interoperability. From 1.3.0 until 1.22.0, onnx.version_converter.convert_version() can perform an out-of-bounds read in Gemm_7_6::adapt_gemm_7_6() in onnx/version_converter/adapters/gemm_7_6.h when a Gemm node has input tensors with fewer than two dimensions because B_shape[1], A_shape[0], or A_shape[1] is accessed without a rank check, potentially causing a process crash during an opset 7 to 6 downgrade. This issue is fixed in version 1.22.0.

## CVSS-Vektor

```
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Lokal | good |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Erforderlich | good |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Keine | good |
| I Integrität | Keine | good |
| A Verfügbarkeit | Gering | warn |

## Patch verfügbar (OSV)

- e9c74f596eaa0250f89e52a54160a25bbcb25b66 (Commit)
- 2bb50465112feca9003e1ed654d77f01ff1415ca (Commit)

## Referenzen

- <https://github.com/onnx/onnx/security/advisories/GHSA-p893-rvq9-2xf9>
- <https://github.com/onnx/onnx/pull/7880>
- <https://github.com/onnx/onnx/commit/e9c74f596eaa0250f89e52a54160a25bbcb25b66>
- <https://github.com/onnx/onnx/releases/tag/v1.22.0>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-63632) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_