---
cve: "CVE-2026-26064"
severity: "CRITICAL"
cvss: 9.3
epss: "88%"
vendor: "kovidgoyal"
kev: false
exploited: false
published: "2026-02-20 02:16:52"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-11T12:09:01+02:00"
---

# CVE-2026-26064

> 9.3 CRITICAL · 🧪 PoC

## Beschreibung

calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. Versions 9.2.1 and below contain a Path Traversal vulnerability that allows arbitrary file writes anywhere the user has write permissions. On Windows, this leads to Remote Code Execution by writing a payload to the Startup folder, which executes on next login. Function extract_pictures only checks startswith('Pictures'), and does not sanitize '..' sequences. calibre's own ZipFile.extractall() in utils/zipfile.py does sanitize '..' via _get_targetpath(), but extract_pictures() bypasses this by using manual zf.read() + open(). This issue has been fixed in version 9.3.0.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- 88e00cd8371310c371b5386d12f06b324ce7278e (Commit)
- e1b5f9b45a5e8fa96c136963ad9a1d35e6adac62 (Commit)

## Referenzen

- <https://github.com/kovidgoyal/calibre/security/advisories/GHSA-72ch-3hqc-pgmp>
- <https://github.com/kovidgoyal/calibre/commit/e1b5f9b45a5e8fa96c136963ad9a1d35e6adac62>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-26064) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_