---
cve: "CVE-2026-49453"
severity: "HIGH"
cvss: 7.0
epss: "19.5%"
vendor: "laurent22"
kev: false
exploited: false
published: "2026-09-21 21:17:03"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-22T21:52:03+02:00"
---

# CVE-2026-49453

> 7.0 HIGH · 🧪 PoC

## Beschreibung

Joplin is an open source note-taking and to-do application that organises notes and lists into notebooks. Prior to 3.6.15 and 3.7.2, Joplin accepts synchronized resource metadata whose id or file_extension contains parent-directory or path-separator characters. BaseItem.unserialize() stores the unvalidated fields, resourceFilename() concatenates them into a destination path, and ResourceFetcher writes the attacker-controlled resource blob outside the resource directory during background synchronization. An attacker with write access to a configured sync target or shared notebook can create or overwrite files at an attacker-chosen existing path without user interaction. This issue is fixed in versions 3.6.15 and 3.7.2.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- c61572660382863595c6b51ccf2263e3d2c4bfce (Commit)
- d9767bd2c6558d4ef1499568cdc72d053f3329ac (Commit)

## Referenzen

- <https://github.com/laurent22/joplin/security/advisories/GHSA-r24r-gp6h-cwgf>
- <https://github.com/laurent22/joplin/pull/15540>
- <https://github.com/laurent22/joplin/pull/15672>
- <https://github.com/laurent22/joplin/commit/18e0b08c282c89ae51612c4eff67af2a45ff5163>
- <https://github.com/laurent22/joplin/commit/50518073740c4501058e366300b42c2f1925cb05>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-49453) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_