SSRF in Fedify-Dev Fedify

CVE-2026-62857

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.

Vulnerability class: SSRF (Server-Side Request Forgery)

EPSS: 0.003 (24.5th percentile) — read the EPSS interpretation.

Affected products

  • Fedify-dev Fedify — versions >= 1.2.0, < 1.9.13, >= 1.10.0, < 1.10.12, >= 2.0.0, < 2.0.22

Weakness classification (CWE)

References