---
cve: "CVE-2026-85786"
severity: "HIGH"
cvss: 8.7
epss: "0.3%"
vendor: "Amazon"
kev: false
exploited: false
published: "2026-09-04 20:17:33"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-24T07:11:22+02:00"
---

# CVE-2026-85786

> 8.7 HIGH · 🧪 PoC

## Beschreibung

Improper handling of highly compressed data in Amazon ion-java before 1.12.1 might allow remote attackers to cause a denial of service via a crafted compressed Ion document that expands to an arbitrarily large size upon decompression due to insufficient coverage of the GZIP auto-decompression opt-out introduced for CVE-2026-75936.



To remediate this issue, users should upgrade to version 1.12.1.

## 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)

- 5210061946558b1768fa2d419c80491760795751 (Commit)

## Referenzen

- <https://github.com/amazon-ion/ion-java/releases/tag/v1.12.1>
- <https://aws.amazon.com/security/security-bulletins/2026-100-aws/>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-85786) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_