CVE CVE-2025-68475

CVE-2025-68475

Express

Severity: HIGH
CVSS: 7.5CVSS
Published: 2025-12-22
Last modified: 2026-03-17
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE: CWE-1333

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.

References

https://github.com/fedify-dev/fedify/commit/2bdcb24d7d6d5886e0214ed504b63a6dc5488779
https://github.com/fedify-dev/fedify/commit/bf2f0783634efed2663d1b187dc55461ee1f987a
https://github.com/fedify-dev/fedify/releases/tag/1.6.13
https://github.com/fedify-dev/fedify/releases/tag/1.7.14
https://github.com/fedify-dev/fedify/releases/tag/1.8.15
https://github.com/fedify-dev/fedify/releases/tag/1.9.2
https://github.com/fedify-dev/fedify/security/advisories/GHSA-rchf-xwx2-hm93

Summary

Description

References