CVE-2025-68475 - CVE House
Back to Database
Status published High CVE-2025-68475

Fedify has ReDoS Vulnerability in HTML Parsing Regex

Vulnerability Description

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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

THREAT MONITOR

Am I Vulnerable?

Launch our assessment wizard to check if your infrastructure is exposed to • CVE-2025-68475

Credits & Attribution

No credits recorded in the NVD database.

References

More from fedify-dev

View All →
CVE-2025-54888
@fedify/fedify: Improper Authentication and Incorrect Authorization
High 8.7
CVE-2025-53941
Hollo renders posts received with form elements and allows submission
Medium 6.1

Affected Vendor

Affected Software

fedify
Vulnerable Versions:
< 1.6.13, >= 1.7.0, < 1.7.14, >= 1.8.0, < 1.8.15, >= 1.9.0, < 1.9.2

Timeline

Official Publish: December 22nd, 2025
Last Modified: December 22nd, 2025
Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weaknesses (CWE)

CWE-1333

MITRE ATT&CK TTPs

T1499 Endpoint Denial of Service
Impact
T1190 Exploit Public-Facing Application
Initial Access
T1496 Resource Hijacking
Impact
T1562 Impair Defenses
Defense Evasion
T1070 Indicator Removal on Host
Defense Evasion