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.

PUBLISHED Reserved 2026-03-25 | Published 2026-04-06 | Updated 2026-04-07 | Assigner GitHub_M

Problem types

CWE-400: Uncontrolled Resource Consumption

CWE-770: Allocation of Resources Without Limits or Throttling

Product status

References

github.com/...fedify/security/advisories/GHSA-gm9m-gwc4-hwgp exploit

github.com/...fedify/security/advisories/GHSA-gm9m-gwc4-hwgp

github.com/fedify-dev/fedify/releases/tag/1.10.5

github.com/fedify-dev/fedify/releases/tag/1.9.6

github.com/fedify-dev/fedify/releases/tag/2.0.8

github.com/fedify-dev/fedify/releases/tag/2.1.1

cve.org (CVE-2026-34148)

nvd.nist.gov (CVE-2026-34148)

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