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.
| Package (Ecosystem) | Introduced | Fixed | Limit |
|---|---|---|---|
| @fedify/fedify(npm) | 0 | 1.6.13 | N/A |
| @fedify/fedify(npm) | 1.7.0 | 1.7.14 | N/A |
| @fedify/fedify(npm) | 1.8.0 | 1.8.15 | N/A |
| @fedify/fedify(npm) | 1.9.0 | 1.9.2 | N/A |
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