CVE-2026-62857
Published:August 06, 2026
Updated:September 01, 2026
Fedify is a TypeScript library for building federated server apps powered by ActivityPub. From version 1.2.0 through the affected 1.9, 1.10, 2.0, 2.1, 2.2, and 2.3 maintenance lines, getNodeInfo() follows an attacker-controlled links[].href value from /.well-known/nodeinfo without scheme, redirect, or private-address validation, allowing requests to loopback, link-local, cloud metadata, and private-network services and returning their response bodies. This issue is fixed in versions 1.9.13, 1.10.12, 2.0.22, 2.1.18, 2.2.7, and 2.3.2.
Affected Packages
@fedify/fedify (NPM):
Affected version(s) >=1.2.0 <1.9.13Fix Suggestion:
Update to version 1.9.13@fedify/fedify (NPM):
Affected version(s) >=2.3.0 <2.3.2Fix Suggestion:
Update to version 2.3.2@fedify/fedify (NPM):
Affected version(s) >=1.10.0 <1.10.12Fix Suggestion:
Update to version 1.10.12@fedify/fedify (NPM):
Affected version(s) >=2.2.0 <2.2.7Fix Suggestion:
Update to version 2.2.7@fedify/fedify (NPM):
Affected version(s) >=2.0.0 <2.0.22Fix Suggestion:
Update to version 2.0.22@fedify/fedify (NPM):
Affected version(s) >=2.1.0 <2.1.18Fix Suggestion:
Update to version 2.1.18Related Resources (4)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.8
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
NONE
Vulnerable System Availability
LOW
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
8.2
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
LOW
Weakness Type (CWE)
Server-Side Request Forgery (SSRF)
EPSS
Base Score:
0.25