---
cve: "CVE-2026-28268"
severity: "CRITICAL"
cvss: 9.8
epss: "0.7%"
vendor: "go-vikunja"
kev: false
exploited: false
published: "2026-02-27 21:16:18"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-21T12:22:56+02:00"
---

# CVE-2026-28268

> 9.8 CRITICAL · 🧪 PoC

## Beschreibung

Vikunja is an open-source self-hosted task management platform. Versions prior to 2.1.0 have a business logic vulnerability exists in the password reset mechanism of vikunja/api that allows password reset tokens to be reused indefinitely. Due to a failure to invalidate tokens upon use and a critical logic bug in the token cleanup cron job, reset tokens remain valid forever. This allows an attacker who intercepts a single reset token (via logs, browser history, or phishing) to perform a complete, persistent account takeover at any point in the future, bypassing standard authentication controls. Version 2.1.0 contains a patch for the issue.

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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 | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Hoch | bad |

## Patch verfügbar (OSV)

- ec11643c24b0f00c55ec5a60328b54e2c3a69962 (Commit)
- 5c2195f9fca9ad208477e865e6009c37889f87b2 (Commit)

## Referenzen

- <https://github.com/go-vikunja/vikunja/security/advisories/GHSA-rfjg-6m84-crj2>
- <https://github.com/go-vikunja/vikunja/commit/5c2195f9fca9ad208477e865e6009c37889f87b2>
- <https://vikunja.io/changelog/vikunja-v2.1.0-was-released>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-28268) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_