---
cve: "CVE-2026-34582"
severity: "HIGH"
cvss: 8.7
epss: "23%"
vendor: "Randombit"
kev: false
exploited: false
published: "2026-04-07 22:16:22"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-13T15:10:45+02:00"
---

# CVE-2026-34582

> 8.7 HIGH · 🧪 PoC

## Beschreibung

Botan is a C++ cryptography library. Prior to version 3.11.1, the TLS 1.3 implementation allowed ApplicationData records to be processed prior to the Finished message being received. A server which is attempting to enforce client authentication via certificates can by bypassed by a client which entirely omits Certificate, CertificateVerify, and the Finished message and instead sends application data records. This vulnerability is fixed in 3.11.1.

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/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)

- 86d105523def181ae833e3aaaf773b1b0c20dda4 (Commit)

## Referenzen

- <https://github.com/randombit/botan/security/advisories/GHSA-pxcj-9ppx-g86g>
- <https://access.redhat.com/security/cve/CVE-2026-34582>
- <https://bugzilla.redhat.com/show_bug.cgi?id=2456285>
- <https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34582.json>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-34582) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_