CVE-2025-68475
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.55%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.55% probability · 44th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-1333
- Affected
- fedify/fedify
- Source
- security-advisories@github.com
References
- https://github.com/fedify-dev/fedify/commit/2bdcb24d7d6d5886e0214ed504b63a6dc5488779Patch
- https://github.com/fedify-dev/fedify/commit/bf2f0783634efed2663d1b187dc55461ee1f987aPatch
- https://github.com/fedify-dev/fedify/releases/tag/1.6.13Product, Release Notes
- https://github.com/fedify-dev/fedify/releases/tag/1.7.14Product, Release Notes
- https://github.com/fedify-dev/fedify/releases/tag/1.8.15Product, Release Notes
- https://github.com/fedify-dev/fedify/releases/tag/1.9.2Product, Release Notes
- https://github.com/fedify-dev/fedify/security/advisories/GHSA-rchf-xwx2-hm93Exploit, Mitigation, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.