High severityOSV Advisory· Published Dec 22, 2025· Updated Dec 22, 2025
Fedify has ReDoS Vulnerability in HTML Parsing Regex
CVE-2025-68475
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.
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LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
@fedify/fedifynpm | < 1.6.13 | 1.6.13 |
@fedify/fedifynpm | >= 1.7.0, < 1.7.14 | 1.7.14 |
@fedify/fedifynpm | >= 1.8.0, < 1.8.15 | 1.8.15 |
@fedify/fedifynpm | >= 1.9.0, < 1.9.2 | 1.9.2 |
Affected products
2- Range: 0.1.0, 0.10.0, 0.11.0, …
Patches
Vulnerability mechanics
References
9- github.com/advisories/GHSA-rchf-xwx2-hm93ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2025-68475ghsaADVISORY
- github.com/fedify-dev/fedify/commit/2bdcb24d7d6d5886e0214ed504b63a6dc5488779ghsax_refsource_MISCWEB
- github.com/fedify-dev/fedify/commit/bf2f0783634efed2663d1b187dc55461ee1f987aghsax_refsource_MISCWEB
- github.com/fedify-dev/fedify/releases/tag/1.6.13ghsax_refsource_MISCWEB
- github.com/fedify-dev/fedify/releases/tag/1.7.14ghsax_refsource_MISCWEB
- github.com/fedify-dev/fedify/releases/tag/1.8.15ghsax_refsource_MISCWEB
- github.com/fedify-dev/fedify/releases/tag/1.9.2ghsax_refsource_MISCWEB
- github.com/fedify-dev/fedify/security/advisories/GHSA-rchf-xwx2-hm93ghsax_refsource_CONFIRMWEB
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