---
cve: "CVE-2026-91972"
severity: "HIGH"
cvss: 8.7
epss: "0.5%"
vendor: "go-vikunja"
kev: false
exploited: false
published: "2026-09-15 16:17:54"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-21T01:34:02+02:00"
---

# CVE-2026-91972

> 8.7 HIGH · 🧪 PoC

## Beschreibung

Vikunja versions before 2.6.0 fail to apply rate limiting to /api/v2 public authentication endpoints including login, register, password-reset, and OAuth token routes. Remote unauthenticated attackers can perform unbounded credential guessing, account enumeration, and password-reset flooding attacks without throttling restrictions.

## CVSS-Vektor

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

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- a4218eeb8fb3ada95e14a2331731524c9120d5bd (Commit)

## Referenzen

- <https://github.com/go-vikunja/vikunja/security/advisories/GHSA-6rvj-qwjf-3m4q>
- <https://www.vulncheck.com/advisories/vikunja-before-2.6.0-authentication-bypass-via-unthrottled-api>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-91972) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_