---
cve: "CVE-2026-114724"
severity: "HIGH"
cvss: 7.4
epss: ""
vendor: "Roundcube"
kev: false
exploited: false
published: "2026-10-22 02:17:00"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-10-23T23:27:50+02:00"
---

# CVE-2026-114724

> 7.4 HIGH · 🧪 PoC

## Beschreibung

Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 contains an object injection primitive in rcube_session::unserialize(). A session key prefixed with “!” was treated as having no value, and the reconstructed serialized string was emitted with a key but no corresponding value, desynchronizing the remainder of the input so that following session data was interpreted as a serialized value. This yields a PHP object injection primitive for an attacker able to influence stored session data. Upstream fixed this in the commit “Fix object injection primitive in rcube_session::unserialize() via “!”-prefixed session keys”, which rejects such keys.

## CNA-Record (Kanon, cvelistV5)

- CNA: **mitre**
- State: PUBLISHED
- Stand: 2026-10-22 01:48:23
- CNA-CVSS: **7.4** (`CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H`)

## CVSS-Vektor

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

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

## Schwachstellen-Klasse

- **CWE-502** — Deserialization of Untrusted Data
  The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

## Angriffsmuster (CAPEC)

- [CAPEC-586 — Object Injection](https://capec.mitre.org/data/definitions/586.html) _(Severity: High)_

## Patch verfügbar (OSV)

- 1dd910522e73318447ed6e20bed1efd7adeb240a (Commit)
- 26d1b077f0c910a16c44c1862fe26e15f0bb3685 (Commit)

## Referenzen

- <https://bugs.debian.org/1151279>
- <https://github.com/roundcube/roundcubemail/commit/93284f3f0e13f99af37fc3b81861e142eea8a922>
- <https://roundcube.net/news/2026/10/19/security-updates-1.6.20-and-1.7.5>
- <https://github.com/roundcube/roundcubemail/releases/tag/1.7.5>
- <https://github.com/roundcube/roundcubemail/releases/tag/1.6.20>
- <https://github.com/roundcube/roundcubemail/commit/833770d3d3c35cfde74cc2614d368f25a75b6f99>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2026-114724/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_