CVE-2026-34148

HIGH EPSS 41.9%
Published Apr 6, 20262mo ago · Modified Jun 17, 20261w ago
7.5 CVSS 3.1
High
Find Similar
Published Apr 6, 2026 2mo ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
41.9% percentile
Exploit & Patch Status
Public Exploit Known
No Patch Available

Weaknesses 2

CWE-400 Uncontrolled Resource Consumption Resource Mgmt
CWE-770

Affected Products 6

VendorProductVersionRange
fedifyfedify\/fedify* <1.9.6
fedifyfedify\/fedify*≥1.10.0  –  <1.10.5
fedifyfedify\/fedify*≥2.0.0  –  <2.0.8
fedifyfedify\/fedify*≥2.1.0  –  <2.1.1
fedifyfedify\/vocab-runtime* <2.0.8
fedifyfedify\/vocab-runtime*≥2.1.0  –  <2.1.1

References 5

  • github.com https://github.com/fedify-dev/fedify/releases/tag/1.10.5
    Release Notes
  • github.com https://github.com/fedify-dev/fedify/releases/tag/1.9.6
    Release Notes
  • github.com https://github.com/fedify-dev/fedify/releases/tag/2.0.8
    Release Notes
  • github.com https://github.com/fedify-dev/fedify/releases/tag/2.1.1
    Release Notes
  • github.com https://github.com/fedify-dev/fedify/security/advisories/GHSA-gm9m-gwc4-hwgp
    ExploitVendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.