---
cve: "CVE-2026-27780"
severity: "CRITICAL"
cvss: 9.8
epss: "47%"
vendor: "Gitea"
kev: false
exploited: false
published: "2026-07-03 21:16:59"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-07T13:06:02+02:00"
---

# CVE-2026-27780

> 9.8 CRITICAL · 🧪 PoC

## Beschreibung

Gitea versions before 1.26.0 do not fail closed on bufio.Scanner errors while processing pre-receive hook input, allowing oversized input to bypass branch-protection checks.

## 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)

- f09bea7af13bd00d07a34252468389d15de39a8d (Commit)

## Referenzen

- <https://github.com/go-gitea/gitea/pull/36963>
- <https://github.com/go-gitea/gitea/releases/tag/v1.26.0>
- <https://blog.gitea.com/release-of-1.26.0/>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-27780) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_