---
cve: "CVE-2026-62857"
severity: "HIGH"
cvss: 8.8
epss: "25%"
vendor: "fedify-dev"
kev: false
exploited: false
published: "2026-08-06 22:18:12"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-06T06:07:49+02:00"
---

# CVE-2026-62857

> 8.8 HIGH · 🧪 PoC

## Beschreibung

Fedify is a TypeScript library for building federated server apps powered by ActivityPub. From version 1.2.0 through the affected 1.9, 1.10, 2.0, 2.1, 2.2, and 2.3 maintenance lines, getNodeInfo() follows an attacker-controlled links[].href value from /.well-known/nodeinfo without scheme, redirect, or private-address validation, allowing requests to loopback, link-local, cloud metadata, and private-network services and returning their response bodies. This issue is fixed in versions 1.9.13, 1.10.12, 2.0.22, 2.1.18, 2.2.7, and 2.3.2.

## CVSS-Vektor

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

- 6220cf8090a17051f1ac3217ed172acf8d355d87 (Commit)
- a9fdf26105b5d3622feac42e9a1af7df875c1776 (Commit)

## Referenzen

- <https://github.com/fedify-dev/fedify/security/advisories/GHSA-hqph-j65v-8cq5>
- <https://github.com/fedify-dev/fedify/releases/tag/2.3.2>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-62857) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_