---
cve: "CVE-2026-39892"
severity: "MEDIUM"
cvss: 6.9
epss: "0.7%"
vendor: "pyca"
kev: false
exploited: false
published: "2026-04-08 21:17:01"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-23T13:47:14+02:00"
---

# CVE-2026-39892

> 6.9 MEDIUM · 🧪 PoC

## Beschreibung

cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. From 45.0.0 to before 46.0.7, if a non-contiguous buffer was passed to APIs which accepted Python buffers (e.g. Hash.update()), this could lead to buffer overflows. This vulnerability is fixed in 46.0.7.

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- 622d672e429a7cff836a23c5903683dbec1901f5 (Commit)

## Referenzen

- <https://github.com/pyca/cryptography/security/advisories/GHSA-p423-j2cm-9vmq>
- <http://www.openwall.com/lists/oss-security/2026/04/08/12>
- <https://access.redhat.com/errata/RHSA-2026:19375>
- <https://access.redhat.com/errata/RHSA-2026:20338>
- <https://access.redhat.com/errata/RHSA-2026:21017>
- <https://access.redhat.com/errata/RHSA-2026:22465>
- <https://access.redhat.com/errata/RHSA-2026:22629>
- <https://access.redhat.com/errata/RHSA-2026:22840>
- <https://access.redhat.com/errata/RHSA-2026:23361>
- <https://access.redhat.com/errata/RHSA-2026:24483>
- <https://access.redhat.com/errata/RHSA-2026:24761>
- <https://access.redhat.com/errata/RHSA-2026:24762>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-39892) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_