---
cve: "CVE-2026-25808"
severity: "HIGH"
cvss: 7.5
epss: "45%"
vendor: "fedify-dev"
kev: false
exploited: false
published: "2026-02-09 22:16:02"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-06T11:38:55+02:00"
---

# CVE-2026-25808

> 7.5 HIGH · 🧪 PoC

## Beschreibung

Hollo is a federated single-user microblogging software designed to be federated through ActivityPub. Prior to 0.6.20 and 0.7.2, there is a security vulnerability where DMs and followers-only posts were exposed through the ActivityPub outbox endpoint without authorization. This vulnerability is fixed in 0.6.20 and 0.7.2.

## CVSS-Vektor

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

| 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 | Keine | good |
| A Verfügbarkeit | Keine | good |

## Patch verfügbar (OSV)

- 6f40242f033335958216e92d55c2f875d60a40bc (Commit)
- 4d02a2d28e347c90bf81697e52a66de2bbf4928f (Commit)

## Referenzen

- <https://github.com/fedify-dev/hollo/security/advisories/GHSA-6r2w-3pcj-v4v5>
- <https://github.com/fedify-dev/hollo/commit/329969c502ef092d5c3f9c2c20421c34f4ff0f0e>
- <https://github.com/fedify-dev/hollo/releases/tag/0.6.20>
- <https://github.com/fedify-dev/hollo/releases/tag/0.7.2>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-25808) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_