---
cve: "CVE-2026-49740"
severity: "MEDIUM"
cvss: 6.3
epss: "22%"
vendor: "TYPO3"
kev: false
exploited: false
published: "2026-06-09 11:16:53"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-08T18:14:27+02:00"
---

# CVE-2026-49740

> 6.3 MEDIUM · 🧪 PoC

## Beschreibung

TYPO3's cache frontend (VariableFrontend) and persistent key-value store (Registry) deserialized PHP payloads without integrity validation or class restrictions. An attacker with write access to the underlying storage backend (cache store or sys_registry database table) could inject a crafted serialized payload to trigger PHP Object Injection, potentially exploiting a gadget chain to achieve Remote Code Execution or other high-impact effects. Exploiting this vulnerability requires direct local write access to the storage, such as the SQL database or file system. This issue affects TYPO3 CMS versions before 10.4.57, 11.0.0-11.5.50, 12.0.0-12.4.45, 13.0.0-13.4.30 and 14.0.0-14.3.2.

## CVSS-Vektor

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

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Lokal | good |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- 59bfeaaf0136dfe17011786ce825884e48bedc8d (Commit)
- e16ec78165a7d60f09dcac04bfbb309409e174b3 (Commit)

## Referenzen

- <https://typo3.org/security/advisory/typo3-core-sa-2026-018>
- <https://github.com/TYPO3/typo3/commit/48bcf24f31f52cc0b43d3bea4984634bd2cf85c7>
- <https://github.com/TYPO3/typo3/commit/87cd7c5b710c44d3606fed277b040a75dc6a9c02>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-49740) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_