---
id: CVE-2026-62857
title: >-
  Fedify is a TypeScript library for building federated server apps powered by
  ActivityPub
summary: >-
  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[].h…
severity: none
cwe:
  - CWE-918
published: '2026-08-06'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T20:09:01.757'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-62857'
references:
  - url: 'https://github.com/fedify-dev/fedify/releases/tag/2.3.2'
    label: security-advisories@github.com
  - url: >-
      https://github.com/fedify-dev/fedify/security/advisories/GHSA-hqph-j65v-8cq5
    label: security-advisories@github.com
  - url: >-
      https://github.com/fedify-dev/fedify/security/advisories/GHSA-hqph-j65v-8cq5
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
epss: 0.00421
epssPercentile: 0.33842
ingestedAt: '2026-08-09T00:31:25.056Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.