CVE-2026-34148
Description
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.
How to fix
- @fedify/fedify1.9.6, 1.10.5, 2.0.8, 2.1.1 or later
- fedify fedify\/fedify1.9.6, 1.10.5, 2.0.8, 2.1.1 or later
- fedify fedify\/vocab-runtime2.0.8, 2.1.1 or later
- @fedify/vocab-runtime2.0.8, 2.1.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| @fedify/fedifynpm | v < 1.9.6, 1.10.0 ≤ v < 1.10.5, 2.0.0 ≤ v < 2.0.8, 2.1.0 ≤ v < 2.1.1 | 1.9.6, 1.10.5, 2.0.8, 2.1.1 |
| fedify fedify\/fedify | v < 1.9.6, 1.10.0 ≤ v < 1.10.5, 2.0.0 ≤ v < 2.0.8, 2.1.0 ≤ v < 2.1.1 | 1.9.6, 1.10.5, 2.0.8, 2.1.1 |
| fedify fedify\/vocab-runtime | v < 2.0.8, 2.1.0 ≤ v < 2.1.1 | 2.0.8, 2.1.1 |
| @fedify/vocab-runtimenpm | v < 2.0.8, 2.1.0 ≤ v < 2.1.1 | 2.0.8, 2.1.1 |
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Attack Surface Management
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