ReDoS Vulnerability in Fedify TypeScript Library for Federated Server Apps
CVE-2025-68475

7.5HIGH

Key Information:

Vendor

Fedify-dev

Status
Fedify
Vendor
CVE Published:
22 December 2025

What is CVE-2025-68475?

A Regular Expression Denial of Service (ReDoS) vulnerability exists in the Fedify TypeScript library's document loader. This vulnerability arises due to the presence of nested quantifiers in the HTML parsing regex, resulting in catastrophic backtracking when processing specially crafted HTML responses. Attackers could exploit this vulnerability to create scenarios where the server becomes unresponsive, impacting service availability. The issue has been addressed in versions 1.6.13, 1.7.14, 1.8.15, and 1.9.2, which users are encouraged to upgrade to.

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Affected Version(s)

fedify < 1.6.13 < 1.6.13

fedify >= 1.7.0, < 1.7.14 < 1.7.0, 1.7.14

fedify >= 1.8.0, < 1.8.15 < 1.8.0, 1.8.15

References

https://github.com/fedify-dev/fedify/security/advisories/...
x_refsource_CONFIRM
https://github.com/fedify-dev/fedify/commit/2bdcb24d7d6d5...
x_refsource_MISC
https://github.com/fedify-dev/fedify/commit/bf2f0783634ef...
x_refsource_MISC

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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