CVE-2026-34148

Severity CVSS v4.0:

Pending analysis

Type:

CWE-400 Uncontrolled Resource Consumption ('Resource Exhaustion')

Publication date:

06/04/2026

Last modified:

25/04/2026

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.

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.50 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x

7.50

Severity 3.x

HIGH

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:fedify:fedify\/fedify::::::node.js::*		1.9.6 (excluding)
cpe:2.3:a:fedify:fedify\/fedify::::::node.js::*	1.10.0 (including)	1.10.5 (excluding)
cpe:2.3:a:fedify:fedify\/fedify::::::node.js::*	2.0.0 (including)	2.0.8 (excluding)
cpe:2.3:a:fedify:fedify\/fedify::::::node.js::*	2.1.0 (including)	2.1.1 (excluding)
cpe:2.3:a:fedify:fedify\/vocab-runtime::::::node.js::*		2.0.8 (excluding)
cpe:2.3:a:fedify:fedify\/vocab-runtime::::::node.js::*	2.1.0 (including)	2.1.1 (excluding)

To consult the complete list of CPE names with products and versions, see this page

CVE-2026-34148

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools