---
cve: "CVE-2026-44523"
severity: "CRITICAL"
cvss: 10.0
epss: "0.2%"
vendor: "enchant97"
kev: false
exploited: false
published: "2026-05-14 19:16:37"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-11-07T04:21:35+01:00"
---

# CVE-2026-44523

> 10.0 CRITICAL · 🧪 PoC

## Beschreibung

Note Mark is an open-source note-taking application. Prior to 0.19.4, no minimum length or entropy is enforced on the JWT_SECRET configuration value. The application accepts any base64-decodable secret regardless of size, including secrets as short as 1 byte. This vulnerability is fixed in 0.19.4.

## CNA-Record (Kanon, cvelistV5)

- CNA: **GitHub_M**
- State: PUBLISHED
- Stand: 2026-05-15 14:55:08
- CNA-CVSS: **10.0** (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N`)

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **poc**
  - Automatable: **yes**
  - Technical Impact: **total**

## CVSS-Vektor

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

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

## Schwachstellen-Klasse

- **CWE-326** — Inadequate Encryption Strength
  The product stores or transmits sensitive data using an encryption scheme that is theoretically sound, but is not strong enough for the level of protection required.
- **CWE-345** — Insufficient Verification of Data Authenticity
  The product does not sufficiently verify the origin or authenticity of data, in a way that causes it to accept invalid data.

## Angriffsmuster (CAPEC)

- [CAPEC-20 — Encryption Brute Forcing](https://capec.mitre.org/data/definitions/20.html) _(Severity: Low)_
- [CAPEC-112 — Brute Force](https://capec.mitre.org/data/definitions/112.html) _(Severity: High)_
- [CAPEC-192 — Protocol Analysis](https://capec.mitre.org/data/definitions/192.html) _(Severity: Low)_

## ATT&CK-Techniken

- [T1110 — Brute Force](https://attack.mitre.org/techniques/T1110/)

## Patch verfügbar (OSV)

- b66e9e0805403ecb4b55feef3074688be4b0136f (Commit)

## Referenzen

- <https://github.com/enchant97/note-mark/security/advisories/GHSA-q6mh-rqwh-g786>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2026-44523/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_