Vulnerability Description
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.
Related Weaknesses (CWE)
References
- https://github.com/fedify-dev/fedify/releases/tag/2.3.2
- https://github.com/fedify-dev/fedify/security/advisories/GHSA-hqph-j65v-8cq5
- https://github.com/fedify-dev/fedify/security/advisories/GHSA-hqph-j65v-8cq5
FAQ
What is CVE-2026-62857?
CVE-2026-62857 is a documented vulnerability. 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() fol...
How severe is CVE-2026-62857?
CVSS scoring is not yet available for CVE-2026-62857. Check NVD for updates.
Is there a patch for CVE-2026-62857?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.