---
cve: "CVE-2026-84851"
severity: "HIGH"
cvss: 8.7
epss: "0.3%"
vendor: "Amazon"
kev: false
exploited: false
published: "2026-09-03 05:16:46"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-24T22:23:13+02:00"
---

# CVE-2026-84851

> 8.7 HIGH · 🧪 PoC

## Beschreibung

An uncontrolled recursion issue exists in Amazon Ion-C versions before 1.1.6 that might allow a remote unauthenticated actor to craft Ion data that exhausts the native call stack and crashes the application using the library, resulting in a denial of service.

## 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)

- 493c12251be6ad93b924abb5cf8621e69f1dd2d5 (Commit)

## Referenzen

- <https://github.com/amazon-ion/ion-c/releases/tag/v1.1.6>
- <https://aws.amazon.com/security/security-bulletins/2026-094-aws/>
- <https://github.com/amazon-ion/ion-c/security/advisories/GHSA-9gfg-hgj4-gh44>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-84851) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_