---
cve: "CVE-2026-24458"
severity: "HIGH"
cvss: 7.5
epss: "27%"
vendor: "Mattermost"
kev: false
exploited: false
published: "2026-03-16 14:18:16"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-15T15:14:24+02:00"
---

# CVE-2026-24458

> 7.5 HIGH

## Beschreibung

Mattermost versions 11.3.x <= 11.3.0, 11.2.x <= 11.2.2, 10.11.x <= 10.11.10 fail to properly handle very long passwords, which allows an attacker to overload the server CPU and memory via executing login attempts with multi-megabyte passwords. Mattermost Advisory ID: MMSA-2026-00587

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- fddd4a70bcb32eaff394a2fa5399efcd1b2ae251 (Commit)
- 005521aa79666e6960bc3302f6172b810f6bff3a (Commit)

## Referenzen

- <https://mattermost.com/security-updates>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-24458) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_