CVE-2025-68475
December 22, 2025
Fedify is a TypeScript library for building federated server apps powered by ActivityPub. Prior to versions 1.6.13, 1.7.14, 1.8.15, and 1.9.2, a Regular Expression Denial of Service (ReDoS) vulnerability exists in Fedify's document loader. The HTML parsing regex at packages/fedify/src/runtime/docloader.ts:259 contains nested quantifiers that cause catastrophic backtracking when processing maliciously crafted HTML responses. This issue has been patched in versions 1.6.13, 1.7.14, 1.8.15, and 1.9.2.
Affected Packages
https://github.com/fedify-dev/fedify.git (GITHUB):
Affected version(s) >=1.7.0 <1.7.14Fix Suggestion:
Update to version 1.7.14https://github.com/fedify-dev/fedify.git (GITHUB):
Affected version(s) >=1.9.0 <1.9.2Fix Suggestion:
Update to version 1.9.2https://github.com/fedify-dev/fedify.git (GITHUB):
Affected version(s) >=0.5.0 <1.6.13Fix Suggestion:
Update to version 1.6.13https://github.com/fedify-dev/fedify.git (GITHUB):
Affected version(s) >=1.8.1 <1.8.15Fix Suggestion:
Update to version 1.8.15@fedify/fedify (NPM):
Affected version(s) >=1.9.0 <1.9.2Fix Suggestion:
Update to version 1.9.2@fedify/fedify (NPM):
Affected version(s) >=1.8.0-dev.909 <1.8.15Fix Suggestion:
Update to version 1.8.15@fedify/fedify (NPM):
Affected version(s) >=1.7.0 <1.7.14Fix Suggestion:
Update to version 1.7.14@fedify/fedify (NPM):
Affected version(s) >=0.5.0 <1.6.13Fix Suggestion:
Update to version 1.6.13Related Resources (9)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Inefficient Regular Expression Complexity
EPSS
Base Score:
0.12
