PT-2026-30656 · Fedify · Fedify+1

Wrathsec · Published 2026-04-06 · Updated 2026-04-06 · CVE-2026-34148

NVD

CVSS v3.1

7.5

High

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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.

Exploit

Fix

Resource Exhaustion

Allocation of Resources Without Limits

Weakness Enumeration

CWE-400

CWE-770

Related Identifiers

CVE-2026-34148

Affected Products

Fedify

Vocab-Runtime

References · 2

• 🔥 https://github.com/fedify-dev/fedify/security/advisories/GHSA-gm9m-gwc4-hwgp · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-34148 · Security Note