---
cve: "CVE-2026-94450"
severity: "HIGH"
cvss: 8.7
epss: "1.9%"
vendor: "aws"
kev: false
exploited: false
published: "2026-09-22 21:17:33"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-24T21:01:05+02:00"
---

# CVE-2026-94450

> 8.7 HIGH · 🧪 PoC

## Beschreibung

Improper validation of the Destination Connection ID length in s2n-quic 1.88.0 and earlier may allow an unauthenticated remote user to cause a denial of service by shutting down a server endpoint via a single crafted UDP datagram. Only server endpoints specifically configured to send Retry packets are affected.



To remediate this issue, users should upgrade to version v1.89.0 or later.

## CVSS-Vektor

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

- 845f1cce431e30fc9c3802fda0a7fb0d65c201be (Commit)

## Referenzen

- <https://github.com/aws/s2n-quic/releases/tag/v1.89.0>
- <https://aws.amazon.com/security/security-bulletins/2026-116-aws/>
- <https://github.com/aws/s2n-quic/security/advisories/GHSA-5rw2-6x5m-v22x>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-94450) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_