CVE-2026-34148

Fedify is a TypeScript library for building federated server apps powered by ActivityPub. Prior to 1.9.6, 1.10.5, 2.0.8, and 2.1.1, @fedify/fedify follows HTTP redirects recursively in its remote document loader and authenticated document loader without enforcing a maximum redirect count or visited-URL loop detection. An attacker who controls a remote ActivityPub key or actor URL can force a server using Fedify to make repeated outbound requests from a single inbound request, leading to resource consumption and denial of service. This vulnerability is fixed in 1.9.6, 1.10.5, 2.0.8, and 2.1.1.

• fedify fedify\/fedify (< 1.9.6) • fedify fedify\/fedify (>= 1.10.0 < 1.10.5) • fedify fedify\/fedify (>= 2.0.0 < 2.0.8) • fedify fedify\/fedify (>= 2.1.0 < 2.1.1) • fedify fedify\/vocab-runtime (< 2.0.8) • fedify fedify\/vocab-runtime (>= 2.1.0 < 2.1.1)