High 7.5Published Dec 22, 2025

CVE-2025-68475Fedify has ReDoS Vulnerability in HTML Parsing Regex

Updated under an hour ago (Oct 27, 2026, 8:50 AM ET)

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Every CVE for fedify-dev fedify

Exploited in the last 30 days

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.

CVSS: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-1333
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Dec 22, 2025
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

fedify-dev fedify fedify_dev:fedify (from the name)	before 1.6.13; from 1.7.0, < 1.7.14; from 1.8.0, < 1.8.15; from 1.9.0, < 1.9.2	CNA record
fedify fedify fedify:fedify	before 1.6.13; from 1.7.0 before 1.7.14; from 1.8.1 before 1.8.15; from 1.9.0 before 1.9.2	NVD

References

References

https://github.com/fedify-dev/fedify/security/advisories/GHSA-rchf-xwx2-hm93	x-refsource-confirm, exploit, mitigation, vendor-advisory
https://github.com/fedify-dev/fedify/commit/2bdcb24d7d6d5886e0214ed504b63a6dc5488779	x-refsource-misc, patch
https://github.com/fedify-dev/fedify/commit/bf2f0783634efed2663d1b187dc55461ee1f987a	x-refsource-misc, patch
https://github.com/fedify-dev/fedify/releases/tag/1.6.13	x-refsource-misc, product, release-notes
https://github.com/fedify-dev/fedify/releases/tag/1.7.14	x-refsource-misc, product, release-notes
https://github.com/fedify-dev/fedify/releases/tag/1.8.15	x-refsource-misc, product, release-notes
https://github.com/fedify-dev/fedify/releases/tag/1.9.2	x-refsource-misc, product, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.