---
cve: "CVE-2026-83596"
severity: "HIGH"
cvss: 8.8
epss: "0.3%"
vendor: "WebKitGTK"
kev: false
exploited: false
published: "2026-08-31 21:17:55"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-10-23T14:24:43+02:00"
---

# CVE-2026-83596

> 8.8 HIGH

## Beschreibung

A flaw was found in WebKitGTK. Processing malicious web content can cause memory corruption due to improper memory handling.

## CNA-Record (Kanon, cvelistV5)

- CNA: **redhat**
- State: PUBLISHED
- Stand: 2026-09-30 22:56:32
- CNA-CVSS: **8.8** (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`)

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **none**
  - Automatable: **no**
  - Technical Impact: **total**

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Erforderlich | good |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Hoch | bad |

## Schwachstellen-Klasse

- **CWE-120** — Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
  The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer.

## Angriffsmuster (CAPEC)

- [CAPEC-10 — Buffer Overflow via Environment Variables](https://capec.mitre.org/data/definitions/10.html) _(Severity: High)_
- [CAPEC-14 — Client-side Injection-induced Buffer Overflow](https://capec.mitre.org/data/definitions/14.html) _(Severity: High)_
- [CAPEC-24 — Filter Failure through Buffer Overflow](https://capec.mitre.org/data/definitions/24.html) _(Severity: High)_
- [CAPEC-42 — MIME Conversion](https://capec.mitre.org/data/definitions/42.html) _(Severity: High)_
- [CAPEC-44 — Overflow Binary Resource File](https://capec.mitre.org/data/definitions/44.html) _(Severity: Very High)_
- [CAPEC-45 — Buffer Overflow via Symbolic Links](https://capec.mitre.org/data/definitions/45.html) _(Severity: High)_
- [CAPEC-46 — Overflow Variables and Tags](https://capec.mitre.org/data/definitions/46.html) _(Severity: High)_
- [CAPEC-100 — Overflow Buffers](https://capec.mitre.org/data/definitions/100.html) _(Severity: Very High)_

## BSI-Hinweise (deutsch)

- [WebKitGTK: Schwachstelle ermöglicht Codeausführung](https://wid.cert-bund.de/portal/wid/sicherheitshinweis/WID-SEC-W-2026-3107) — _BSI-Einstufung: hoch_
  Ein entfernter, anonymer Angreifer kann eine Schwachstelle in WebKitGTK ausnutzen, um eine Speicherbeschädigung zu verursachen und möglicherweise beliebigen Code auszuführen oder einen Denial-of-Service-Zustand auszulösen.

## Referenzen

- <https://access.redhat.com/errata/RHSA-2026:69098>
- <https://access.redhat.com/errata/RHSA-2026:74084>
- <https://access.redhat.com/security/cve/CVE-2026-83596>
- <https://bugs.webkit.org/show_bug.cgi?id=322969>
- <https://bugzilla.redhat.com/show_bug.cgi?id=2526490>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2026-83596/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_