CVE-2025-68475
Fedify has ReDoS Vulnerability in HTML Parsing Regex
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.
INFO
Published Date :
Dec. 22, 2025, 10:16 p.m.
Last Modified :
March 17, 2026, 7:39 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 3.1 | HIGH | MITRE-CVE |
Solution
- Update Fedify to version 1.6.13 or later.
- Update Fedify to version 1.7.14 or later.
- Update Fedify to version 1.8.15 or later.
- Update Fedify to version 1.9.2 or later.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-68475.
| URL | Resource |
|---|---|
| https://github.com/fedify-dev/fedify/commit/2bdcb24d7d6d5886e0214ed504b63a6dc5488779 | Patch |
| https://github.com/fedify-dev/fedify/commit/bf2f0783634efed2663d1b187dc55461ee1f987a | Patch |
| https://github.com/fedify-dev/fedify/releases/tag/1.6.13 | Product Release Notes |
| https://github.com/fedify-dev/fedify/releases/tag/1.7.14 | Product Release Notes |
| https://github.com/fedify-dev/fedify/releases/tag/1.8.15 | Product Release Notes |
| https://github.com/fedify-dev/fedify/releases/tag/1.9.2 | Product Release Notes |
| https://github.com/fedify-dev/fedify/security/advisories/GHSA-rchf-xwx2-hm93 | Exploit Mitigation Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-68475 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-68475
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-68475 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2025-68475 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Mar. 17, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:fedify:fedify:*:*:*:*:*:*:*:* versions up to (excluding) 1.6.13 *cpe:2.3:a:fedify:fedify:*:*:*:*:*:*:*:* versions from (including) 1.7.0 up to (excluding) 1.7.14 *cpe:2.3:a:fedify:fedify:*:*:*:*:*:*:*:* versions from (including) 1.8.1 up to (excluding) 1.8.15 *cpe:2.3:a:fedify:fedify:*:*:*:*:*:*:*:* versions from (including) 1.9.0 up to (excluding) 1.9.2 Added Reference Type GitHub, Inc.: https://github.com/fedify-dev/fedify/commit/2bdcb24d7d6d5886e0214ed504b63a6dc5488779 Types: Patch Added Reference Type GitHub, Inc.: https://github.com/fedify-dev/fedify/commit/bf2f0783634efed2663d1b187dc55461ee1f987a Types: Patch Added Reference Type GitHub, Inc.: https://github.com/fedify-dev/fedify/releases/tag/1.6.13 Types: Product, Release Notes Added Reference Type GitHub, Inc.: https://github.com/fedify-dev/fedify/releases/tag/1.7.14 Types: Product, Release Notes Added Reference Type GitHub, Inc.: https://github.com/fedify-dev/fedify/releases/tag/1.8.15 Types: Product, Release Notes Added Reference Type GitHub, Inc.: https://github.com/fedify-dev/fedify/releases/tag/1.9.2 Types: Product, Release Notes Added Reference Type GitHub, Inc.: https://github.com/fedify-dev/fedify/security/advisories/GHSA-rchf-xwx2-hm93 Types: Exploit, Mitigation, Vendor Advisory -
New CVE Received by [email protected]
Dec. 22, 2025
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-1333 Added Reference https://github.com/fedify-dev/fedify/commit/2bdcb24d7d6d5886e0214ed504b63a6dc5488779 Added Reference https://github.com/fedify-dev/fedify/commit/bf2f0783634efed2663d1b187dc55461ee1f987a Added Reference https://github.com/fedify-dev/fedify/releases/tag/1.6.13 Added Reference https://github.com/fedify-dev/fedify/releases/tag/1.7.14 Added Reference https://github.com/fedify-dev/fedify/releases/tag/1.8.15 Added Reference https://github.com/fedify-dev/fedify/releases/tag/1.9.2 Added Reference https://github.com/fedify-dev/fedify/security/advisories/GHSA-rchf-xwx2-hm93